diff --git a/doc/changelogs/README.md b/doc/changelogs/README.md
index f4894225faa0..de24770a9d34 100644
--- a/doc/changelogs/README.md
+++ b/doc/changelogs/README.md
@@ -23,3 +23,4 @@
 - [1.17 series](v1.17.md)
 - [1.18 series](v1.18.md)
 - [1.19 series](v1.19.md)
+- [1.20 series](./v1.20.md)
diff --git a/doc/changelogs/v1.20.md b/doc/changelogs/v1.20.md
new file mode 100644
index 000000000000..5c119294d0e9
--- /dev/null
+++ b/doc/changelogs/v1.20.md
@@ -0,0 +1,354 @@
+# Changelog 1.20
+
+## [1.20.0] (2026-04-16)
+
+Freeze period: 2026-04-02
+
+[1.20.0]: https://github.com/crystal-lang/crystal/releases/1.20.0
+
+### Features
+
+#### lang
+
+- _(macros)_ Add `#select` and `#reject` to `HashLiteral` and `NamedTupleLiteral` ([#16558], thanks @Blacksmoke16)
+- _(macros)_ Refine error message for unsupported named arguments in macros ([#16576], thanks @hahwul)
+
+[#16558]: https://github.com/crystal-lang/crystal/pull/16558
+[#16576]: https://github.com/crystal-lang/crystal/pull/16576
+
+#### stdlib
+
+- _(cli)_ Add short option bundling for `OptionParser` ([#16770], thanks @Qard)
+- _(crypto)_ Add Kernel TLS support to custom `OpenSSL::BIO` ([#16646], thanks @ysbaddaden)
+- _(files)_ Add `IO#read_greedy` ([#16535], thanks @BlobCodes)
+- _(files)_ Add `FileUtils#rm_f` ([#12832], thanks @zw963)
+- _(llvm)_ Support LLVM 22.1 and 23.0 ([#16631], thanks @HertzDevil)
+- _(networking)_ **[experimental]** Add `Socket#sendfile` (and `Crystal::EventLoop::Socket#sendfile`) ([#16665], thanks @ysbaddaden)
+- _(networking)_ Add `Sec-WebSocket-Protocol` checks to `HTTP::WebSocket::Protocol` ([#16600], [#16671], thanks @antondalgren, @straight-shoota)
+- _(networking)_ Add support for `Sec-WebSocket-Protocol` to `HTTP::WebSocketHandler` ([#16574], thanks @antondalgren)
+- _(networking)_ Add `HTTP::Response#content_type` and `#content_length` as convenient accessors ([#16712], thanks @CTC97)
+- _(networking)_ Detect `OAuth` error in payload ([#16634], thanks @jgaskins)
+- _(runtime)_ Add `Fiber::ExecutionContext::ThreadPool` ([#15885], [#16750], thanks @ysbaddaden)
+- _(runtime)_ Add `Pointer#align_up` and `#align_down` ([#16585], thanks @BlobCodes)
+- _(runtime)_ Detach execution context scheduler from running thread during blocking syscall ([#15871], [#16679], thanks @ysbaddaden)
+- _(runtime)_ Forward API docs for properties in `record` macro ([#16172], thanks @Vici37)
+- _(runtime)_ Add `Crystal::Lock` ([#16768], thanks @ysbaddaden)
+- _(system)_ Use `FdLock` on all targets ([#16569], thanks @ysbaddaden)
+- _(system)_ Add `Process.new` with `args` instead of `command, args` ([#16681], thanks @straight-shoota)
+- _(system)_ Add `Process.run(args)` without `command` ([#16739], thanks @straight-shoota)
+- _(system)_ Add `Process.run?` ([#16738], thanks @straight-shoota)
+- _(system)_ Add `Process.capture` ([#16773], thanks @straight-shoota)
+- _(text)_ Add `StringScanner#scan`, `#check`, and `#skip` overloads for `Int` ([#16557], thanks @jneen)
+- _(text)_ Add `StringScanner#peek_behind` ([#16593], thanks @jneen)
+- _(text)_ Add convenience methods to `StringScanner` ([#16595], thanks @jneen)
+- _(text)_ Improve cursor window format in `StringScanner#inspect` ([#16594], thanks @jneen)
+
+[#12832]: https://github.com/crystal-lang/crystal/pull/12832
+[#15871]: https://github.com/crystal-lang/crystal/pull/15871
+[#15885]: https://github.com/crystal-lang/crystal/pull/15885
+[#16172]: https://github.com/crystal-lang/crystal/pull/16172
+[#16535]: https://github.com/crystal-lang/crystal/pull/16535
+[#16557]: https://github.com/crystal-lang/crystal/pull/16557
+[#16569]: https://github.com/crystal-lang/crystal/pull/16569
+[#16574]: https://github.com/crystal-lang/crystal/pull/16574
+[#16585]: https://github.com/crystal-lang/crystal/pull/16585
+[#16593]: https://github.com/crystal-lang/crystal/pull/16593
+[#16594]: https://github.com/crystal-lang/crystal/pull/16594
+[#16595]: https://github.com/crystal-lang/crystal/pull/16595
+[#16600]: https://github.com/crystal-lang/crystal/pull/16600
+[#16631]: https://github.com/crystal-lang/crystal/pull/16631
+[#16634]: https://github.com/crystal-lang/crystal/pull/16634
+[#16646]: https://github.com/crystal-lang/crystal/pull/16646
+[#16665]: https://github.com/crystal-lang/crystal/pull/16665
+[#16671]: https://github.com/crystal-lang/crystal/pull/16671
+[#16679]: https://github.com/crystal-lang/crystal/pull/16679
+[#16681]: https://github.com/crystal-lang/crystal/pull/16681
+[#16712]: https://github.com/crystal-lang/crystal/pull/16712
+[#16738]: https://github.com/crystal-lang/crystal/pull/16738
+[#16739]: https://github.com/crystal-lang/crystal/pull/16739
+[#16750]: https://github.com/crystal-lang/crystal/pull/16750
+[#16768]: https://github.com/crystal-lang/crystal/pull/16768
+[#16770]: https://github.com/crystal-lang/crystal/pull/16770
+[#16773]: https://github.com/crystal-lang/crystal/pull/16773
+
+#### compiler
+
+- _(cli)_ Prefer modern linker (`mold` or `lld`) ([#16696], thanks @straight-shoota)
+- _(codegen)_ Add `@[TargetFeature]` annotation ([#16717], thanks @stakach)
+- _(parser)_ Parse `MacroVar` with empty expressions: `%var{}` ([#16772], thanks @straight-shoota)
+- _(parser)_ Parse `ProcNotation` with empty arg parenthesis: `() ->` ([#16741], thanks @straight-shoota)
+
+[#16696]: https://github.com/crystal-lang/crystal/pull/16696
+[#16717]: https://github.com/crystal-lang/crystal/pull/16717
+[#16741]: https://github.com/crystal-lang/crystal/pull/16741
+[#16772]: https://github.com/crystal-lang/crystal/pull/16772
+
+#### tools
+
+- _(docs-generator)_ Add `--base-path` for `crystal docs` ([#16091], thanks @matiasgarciaisaia)
+
+[#16091]: https://github.com/crystal-lang/crystal/pull/16091
+
+### Bugfixes
+
+#### stdlib
+
+- _(compress)_ Fix decode gzip MTIME as `UInt32` ([#16730], thanks @kojix2)
+- _(crypto)_ **[breaking]** OpenSSL sockets shouldn't flush on read ([#16650], thanks @ysbaddaden)
+- _(files)_ Fix MIME.parse_media_type invalid character check ([#16793], thanks @cuiweixie)
+- _(networking)_ **[regression]** Fix `HTTP::Headers#merge!` to not wrap key ([#16624], thanks @straight-shoota)
+- _(networking)_ Fix `forward_missing_to` in `HTTP::Headers` ([#16637], thanks @straight-shoota)
+- _(numeric)_ Fix `Indexable#range_to_index_and_count` with unsigned integers ([#16597], thanks @jneen)
+- _(numeric)_ **[regression]** Fix `Float32#abs` to return `Float32` ([#16655], thanks @straight-shoota)
+- _(runtime)_ Rename filename to path in WASI `EventLoop#open` ([#16636], thanks @kojix2)
+- _(runtime)_ `Thread.sleep` is invalid when duration >= 1 minute ([#16629], thanks @ysbaddaden)
+- _(runtime)_ Fix typos in ELF reader ([#16668], thanks @kojix2)
+- _(runtime)_ don't terminate thread on Windows/IOCP ([#16680], thanks @ysbaddaden)
+- _(runtime)_ `Sync::ConditionVariable` can hang forever ([#16677], thanks @ysbaddaden)
+- _(runtime)_ Fix `Pointer#to_s` with lib typedefs ([#16687], thanks @straight-shoota)
+- _(runtime)_ Fix race condition in `Process#wait` on Windows ([#16766], thanks @ysbaddaden)
+- _(serialization)_ call `xmlFree` for string pointer from `xmlNodeGetContent` ([#16688], thanks @toddsundsted)
+- _(system)_ Fix `Dir.glob` matching wildcard with dot directory ([#16604], thanks @straight-shoota)
+- _(system)_ Lenient `Fiber.current` access on segfault handler ([#16612], thanks @bcardiff)
+- _(system)_ **[breaking]** Fix `Process#wait` to not close `@input` before waiting ([#16620], [#16638], thanks @straight-shoota, @ysbaddaden)
+- _(system)_ Fix `System.cpu_count` returns `Int32` ([#16648], thanks @straight-shoota)
+- _(system)_ Fix `Process.new(args)` etc. support `Enumerable(String)` args ([#16784], thanks @straight-shoota)
+- _(text)_ Fix `IO::Encoder#write` when operating on long strings ([#16797], thanks @jgaskins)
+- _(text)_ Fix `String#scan` zero-width matches with multibyte characters ([#16684], thanks @error256)
+
+[#16597]: https://github.com/crystal-lang/crystal/pull/16597
+[#16604]: https://github.com/crystal-lang/crystal/pull/16604
+[#16612]: https://github.com/crystal-lang/crystal/pull/16612
+[#16620]: https://github.com/crystal-lang/crystal/pull/16620
+[#16624]: https://github.com/crystal-lang/crystal/pull/16624
+[#16629]: https://github.com/crystal-lang/crystal/pull/16629
+[#16636]: https://github.com/crystal-lang/crystal/pull/16636
+[#16637]: https://github.com/crystal-lang/crystal/pull/16637
+[#16638]: https://github.com/crystal-lang/crystal/pull/16638
+[#16648]: https://github.com/crystal-lang/crystal/pull/16648
+[#16650]: https://github.com/crystal-lang/crystal/pull/16650
+[#16655]: https://github.com/crystal-lang/crystal/pull/16655
+[#16668]: https://github.com/crystal-lang/crystal/pull/16668
+[#16677]: https://github.com/crystal-lang/crystal/pull/16677
+[#16680]: https://github.com/crystal-lang/crystal/pull/16680
+[#16684]: https://github.com/crystal-lang/crystal/pull/16684
+[#16687]: https://github.com/crystal-lang/crystal/pull/16687
+[#16688]: https://github.com/crystal-lang/crystal/pull/16688
+[#16730]: https://github.com/crystal-lang/crystal/pull/16730
+[#16766]: https://github.com/crystal-lang/crystal/pull/16766
+[#16784]: https://github.com/crystal-lang/crystal/pull/16784
+[#16793]: https://github.com/crystal-lang/crystal/pull/16793
+[#16797]: https://github.com/crystal-lang/crystal/pull/16797
+
+#### compiler
+
+- _(codegen)_ Emit `unreachable` for inlined `NoReturn` returns ([#16690], thanks @kojix2)
+- _(codegen)_ Fix alignment for fields in packed structs for x86_64 ABI ([#16667], thanks @kojix2)
+- _(codegen)_ Fix `declare_fun` attribute copy ([#16708], thanks @kojix2)
+- _(parser)_ **[breaking]** Ensure that heredoc lexing allows only valid identifiers ([#16548], thanks @Sija)
+- _(parser)_ **[regression]** Fix lexing percent literals with `|` delimiter in macro context ([#16672], [#16716], thanks @toddsundsted, @straight-shoota)
+- _(parser)_ Escape quotes in the filename within the location pragmas ([#16549], thanks @Sija)
+- _(semantic)_ Fix constant lookup in ivar initializer blocks ([#16678], thanks @nobodywasishere)
+- _(semantic)_ Fix ICE on alias generic instance namespace lookup ([#16700], thanks @nobodywasishere)
+- _(semantic)_ Fix tuple splat validation ([#16787], thanks @kojix2)
+
+[#16548]: https://github.com/crystal-lang/crystal/pull/16548
+[#16549]: https://github.com/crystal-lang/crystal/pull/16549
+[#16667]: https://github.com/crystal-lang/crystal/pull/16667
+[#16672]: https://github.com/crystal-lang/crystal/pull/16672
+[#16678]: https://github.com/crystal-lang/crystal/pull/16678
+[#16690]: https://github.com/crystal-lang/crystal/pull/16690
+[#16700]: https://github.com/crystal-lang/crystal/pull/16700
+[#16708]: https://github.com/crystal-lang/crystal/pull/16708
+[#16716]: https://github.com/crystal-lang/crystal/pull/16716
+[#16787]: https://github.com/crystal-lang/crystal/pull/16787
+
+#### tools
+
+- _(formatter)_ Fix formatter `ProcNotation` with parens around argument type ([#16753], thanks @straight-shoota)
+- _(formatter)_ Fix track line increment when formatting macro literal only ([#16761], thanks @straight-shoota)
+- _(formatter)_ Fix formatter indent and newlines between expression items ([#16769], thanks @straight-shoota)
+
+[#16753]: https://github.com/crystal-lang/crystal/pull/16753
+[#16761]: https://github.com/crystal-lang/crystal/pull/16761
+[#16769]: https://github.com/crystal-lang/crystal/pull/16769
+
+### Performance
+
+#### stdlib
+
+- _(time)_ Improve performance of `System::Time.monotonic` on Windows ([#16555], thanks @straight-shoota)
+
+[#16555]: https://github.com/crystal-lang/crystal/pull/16555
+
+### Refactor
+
+#### stdlib
+
+- _(crypto)_ dust off `OpenSSL::BIO` ([#16640], thanks @ysbaddaden)
+- _(crypto)_ Refactor initialization of custom OpenSSL BIO ([#16651], thanks @ysbaddaden)
+- _(numeric)_ **[experimental]** Use `Slice.literal` for `fast_float` when supported, part 2 ([#16261], thanks @HertzDevil)
+- _(runtime)_ **[deprecation]** Soft deprecate `Mutex` in favor to `Sync::Mutex` ([#16737], [#16759], [#16802], thanks @ysbaddaden)
+- _(runtime)_ Protect `Crystal::System::Env` with `Sync::RWLock` (UNIX) ([#16591], thanks @ysbaddaden)
+- _(runtime)_ Refactor `System::Process.make_env_block` into `System::Env` (win32) ([#16605], thanks @ysbaddaden)
+- _(runtime)_ Use `System.wstr_literal` for env names on Win32 ([#16669], thanks @kojix2)
+- _(runtime)_ Add adaptive scaling to `ExecutionContext::Parallel` ([#16719], thanks @ysbaddaden)
+- _(runtime)_ Handle events in `EventLoop::IOCP` instead of `System::IOCP` ([#16765], thanks @ysbaddaden)
+- _(runtime)_ Add internal state to `Fiber::ExecutionContext::Parallel::Scheduler` ([#16732], thanks @ysbaddaden)
+- _(runtime)_ Replace `Mutex` use cases with `Sync::Mutex` ([#16783], thanks @ysbaddaden)
+- _(specs)_ Prefer `with_env` helper over mutating `ENV` in specs ([#16608], thanks @ysbaddaden)
+- _(specs)_ Remove unnecessary `shell: true` from `Process.run` calls ([#16781], thanks @ysbaddaden)
+- _(system)_ Avoid deprecated `Pointer.new(Int)` in `dlfcn` ([#16691], thanks @kojix2)
+- _(system)_ Refactor code duplication in `Process.new` overloads ([#16782], thanks @straight-shoota)
+
+[#16261]: https://github.com/crystal-lang/crystal/pull/16261
+[#16591]: https://github.com/crystal-lang/crystal/pull/16591
+[#16605]: https://github.com/crystal-lang/crystal/pull/16605
+[#16608]: https://github.com/crystal-lang/crystal/pull/16608
+[#16640]: https://github.com/crystal-lang/crystal/pull/16640
+[#16651]: https://github.com/crystal-lang/crystal/pull/16651
+[#16669]: https://github.com/crystal-lang/crystal/pull/16669
+[#16691]: https://github.com/crystal-lang/crystal/pull/16691
+[#16719]: https://github.com/crystal-lang/crystal/pull/16719
+[#16732]: https://github.com/crystal-lang/crystal/pull/16732
+[#16737]: https://github.com/crystal-lang/crystal/pull/16737
+[#16759]: https://github.com/crystal-lang/crystal/pull/16759
+[#16765]: https://github.com/crystal-lang/crystal/pull/16765
+[#16781]: https://github.com/crystal-lang/crystal/pull/16781
+[#16782]: https://github.com/crystal-lang/crystal/pull/16782
+[#16783]: https://github.com/crystal-lang/crystal/pull/16783
+[#16802]: https://github.com/crystal-lang/crystal/pull/16802
+
+#### compiler
+
+- _(parser)_ Refactor parsing interpolation ([#16693], thanks @straight-shoota)
+- _(parser)_ Standardize `DelimiterState#open_count` to initialize with `0` ([#16771], thanks @straight-shoota)
+
+[#16693]: https://github.com/crystal-lang/crystal/pull/16693
+[#16771]: https://github.com/crystal-lang/crystal/pull/16771
+
+#### tools
+
+- _(formatter)_ Extract helper methods for formatter string interpolation ([#16720], [#16747], thanks @straight-shoota)
+- _(formatter)_ Refactor `Formatter` code for simplification ([#16745], thanks @straight-shoota)
+
+[#16720]: https://github.com/crystal-lang/crystal/pull/16720
+[#16745]: https://github.com/crystal-lang/crystal/pull/16745
+[#16747]: https://github.com/crystal-lang/crystal/pull/16747
+
+### Documentation
+
+#### stdlib
+
+- _(llvm)_ Fix typo ([#16694], thanks @straight-shoota)
+- _(runtime)_ Add Safety section to `ENV` documentation ([#16592], [#16599], thanks @ysbaddaden)
+- _(runtime)_ Fix: `thread_local` macro exposes `Thread` class in stdlib docs ([#16714], thanks @ysbaddaden)
+- _(runtime)_ Improve docs for `Fiber::ExecutionContext` ([#16602], thanks @ysbaddaden)
+- _(runtime)_ Remove invalid `Pointer.new` constructor from API docs ([#16734], thanks @ysbaddaden)
+- _(system)_ Improve documentation for `Process.run` & co ([#16618], thanks @straight-shoota)
+
+[#16592]: https://github.com/crystal-lang/crystal/pull/16592
+[#16599]: https://github.com/crystal-lang/crystal/pull/16599
+[#16602]: https://github.com/crystal-lang/crystal/pull/16602
+[#16618]: https://github.com/crystal-lang/crystal/pull/16618
+[#16694]: https://github.com/crystal-lang/crystal/pull/16694
+[#16714]: https://github.com/crystal-lang/crystal/pull/16714
+[#16734]: https://github.com/crystal-lang/crystal/pull/16734
+
+### Specs
+
+#### stdlib
+
+- _(concurrency)_ Fix: modernize channel specs to avoid parallelism issues ([#16704], thanks @ysbaddaden)
+- _(runtime)_ Fix: increase timeout of execution context stress test helper ([#16639], thanks @ysbaddaden)
+- _(runtime)_ Fix: `Fiber#resumable?` spec must run in concurrent context ([#16731], thanks @ysbaddaden)
+- _(system)_ Add specs for `Process.run(shell: true)` with `PATH` ([#16617], thanks @straight-shoota)
+
+[#16617]: https://github.com/crystal-lang/crystal/pull/16617
+[#16639]: https://github.com/crystal-lang/crystal/pull/16639
+[#16704]: https://github.com/crystal-lang/crystal/pull/16704
+[#16731]: https://github.com/crystal-lang/crystal/pull/16731
+
+#### compiler
+
+- Add `Crystal::Config.path=` for spec helper ([#16613], thanks @straight-shoota)
+- _(codegen)_ Rename duplicated "between 64 and 128 bits" case ([#16683], thanks @kojix2)
+- _(codegen)_ Add "compile" spec helper ([#16735], thanks @ysbaddaden)
+- _(parser)_ Add parser specs for escaping in delimited literals ([#16703], [#16709], thanks @straight-shoota)
+- _(parser)_ Refactor `assert_syntax_error` to use `expect_raises` ([#16711], thanks @straight-shoota)
+- _(parser)_ Add formatter specs for `ProcNotation` ([#16742], thanks @straight-shoota)
+- _(parser)_ Add `spec/syntax_spec.cr` ([#16749], thanks @straight-shoota)
+- _(parser)_ Add specs for parsing `MacroVar` syntax inside literals ([#16778], thanks @straight-shoota)
+- _(semantic)_ Fix typo in `Link` annotation spec ([#16710], thanks @kojix2)
+
+[#16613]: https://github.com/crystal-lang/crystal/pull/16613
+[#16683]: https://github.com/crystal-lang/crystal/pull/16683
+[#16703]: https://github.com/crystal-lang/crystal/pull/16703
+[#16709]: https://github.com/crystal-lang/crystal/pull/16709
+[#16710]: https://github.com/crystal-lang/crystal/pull/16710
+[#16711]: https://github.com/crystal-lang/crystal/pull/16711
+[#16735]: https://github.com/crystal-lang/crystal/pull/16735
+[#16742]: https://github.com/crystal-lang/crystal/pull/16742
+[#16749]: https://github.com/crystal-lang/crystal/pull/16749
+[#16778]: https://github.com/crystal-lang/crystal/pull/16778
+
+#### tools
+
+- _(formatter)_ Improve formatter spec helper to show trailing whitespace ([#16760], thanks @straight-shoota)
+
+[#16760]: https://github.com/crystal-lang/crystal/pull/16760
+
+### Infrastructure
+
+- Changelog for 1.20.0 ([#16751], thanks @straight-shoota)
+- Update previous Crystal release 1.19.0 ([#16572], thanks @ysbaddaden)
+- Update `devenv.lock` ([#16426], [#16588], [#16658], [#16673], [#16775], thanks @github-actions)
+- Update previous Crystal release 1.19.1 ([#16598], thanks @ysbaddaden)
+- Drop `ENV.[]=` in `generate_windows_zone_names` ([#16606], thanks @straight-shoota)
+- Update devenv 2.0 ([#16705], thanks @straight-shoota)
+- Add changelogs for older releases ([#16698], [#16791], thanks @straight-shoota)
+- Disable buggy ameba rule `Lint/SpecFocus` ([#16740], thanks @straight-shoota)
+- scripts/github-changelog.cr: Group PRs with same name ([#16788], thanks @straight-shoota)
+- scripts/github-changelog.cr: Sort link ref labels by PR number ([#16789], thanks @straight-shoota)
+- scripts/update-changelog.sh: Fix escape output of final command ([#16790], thanks @straight-shoota)
+- _(ci)_ Adjust triggers for `update-devenv` workflow ([#16587], thanks @straight-shoota)
+- _(ci)_ Update GH Actions ([#16546], [#16619], [#16660], [#16702], [#16786], thanks @renovate)
+- _(ci)_ Refactor Linux CI workflows ([#16615], thanks @ysbaddaden)
+- _(ci)_ Fix lint workflow to use `prek` instead of `pre-commit` ([#16653], thanks @straight-shoota)
+- _(ci)_ Add `fail-fast: false` to all matrix strategies ([#16656], thanks @straight-shoota)
+- _(ci)_ Drop separate lint workflows for actionlint and shellcheck ([#16663], thanks @straight-shoota)
+- _(ci)_ Run `lint` workflow on all files when `devenv.lock` was changed ([#16682], thanks @straight-shoota)
+- _(ci)_ Pin `nixpkgs` in `lint` workflow ([#16706], thanks @straight-shoota)
+- _(ci)_ Update cachix/install-nix-action digest to 1ca7d21 ([#16727], thanks @renovate)
+- _(ci)_ Test stdlib with execution contexts on Windows and macOS ([#16701], thanks @ysbaddaden)
+
+[#16426]: https://github.com/crystal-lang/crystal/pull/16426
+[#16546]: https://github.com/crystal-lang/crystal/pull/16546
+[#16572]: https://github.com/crystal-lang/crystal/pull/16572
+[#16587]: https://github.com/crystal-lang/crystal/pull/16587
+[#16588]: https://github.com/crystal-lang/crystal/pull/16588
+[#16598]: https://github.com/crystal-lang/crystal/pull/16598
+[#16606]: https://github.com/crystal-lang/crystal/pull/16606
+[#16615]: https://github.com/crystal-lang/crystal/pull/16615
+[#16619]: https://github.com/crystal-lang/crystal/pull/16619
+[#16653]: https://github.com/crystal-lang/crystal/pull/16653
+[#16656]: https://github.com/crystal-lang/crystal/pull/16656
+[#16658]: https://github.com/crystal-lang/crystal/pull/16658
+[#16660]: https://github.com/crystal-lang/crystal/pull/16660
+[#16663]: https://github.com/crystal-lang/crystal/pull/16663
+[#16673]: https://github.com/crystal-lang/crystal/pull/16673
+[#16682]: https://github.com/crystal-lang/crystal/pull/16682
+[#16698]: https://github.com/crystal-lang/crystal/pull/16698
+[#16701]: https://github.com/crystal-lang/crystal/pull/16701
+[#16702]: https://github.com/crystal-lang/crystal/pull/16702
+[#16705]: https://github.com/crystal-lang/crystal/pull/16705
+[#16706]: https://github.com/crystal-lang/crystal/pull/16706
+[#16727]: https://github.com/crystal-lang/crystal/pull/16727
+[#16740]: https://github.com/crystal-lang/crystal/pull/16740
+[#16751]: https://github.com/crystal-lang/crystal/pull/16751
+[#16775]: https://github.com/crystal-lang/crystal/pull/16775
+[#16786]: https://github.com/crystal-lang/crystal/pull/16786
+[#16788]: https://github.com/crystal-lang/crystal/pull/16788
+[#16789]: https://github.com/crystal-lang/crystal/pull/16789
+[#16790]: https://github.com/crystal-lang/crystal/pull/16790
+[#16791]: https://github.com/crystal-lang/crystal/pull/16791
diff --git a/shard.yml b/shard.yml
index 2ca4001af53b..a5527e5644f7 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: crystal
-version: 1.20.0-dev
+version: 1.20.0
 
 authors:
   - Crystal Core Team <crystal@manas.tech>
diff --git a/src/SOURCE_DATE_EPOCH b/src/SOURCE_DATE_EPOCH
new file mode 100644
index 000000000000..614fdc86bea9
--- /dev/null
+++ b/src/SOURCE_DATE_EPOCH
@@ -0,0 +1 @@
+1776297600
diff --git a/src/VERSION b/src/VERSION
index 734375f897d0..398935591556 100644
--- a/src/VERSION
+++ b/src/VERSION
@@ -1 +1 @@
-1.20.0-dev
+1.20.0