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Prospective release calendar

release-info/calendar.md

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Prospective release calendar

This is a prospective calendar for the next releases of OCaml.

This document is intended to give a very rough idea of the timeline for the next versions of OCaml to anyone interested. However, it would be an unforeseen accident if this prospective calendar ever matches the real release calendar.

Main versions

(Last updated on 25 February 2026)

OCaml 5.7.0

ReleaseExpected (early)Expected (late)Actual
Feature freeze1st January 2027
Release1st April 2027

OCaml 5.6.0

ReleaseExpected (early)Expected (late)Actual
Feature freeze1st August 20261st September 2026
Release1st October1st December

OCaml 5.5.0

ReleaseExpected (early)Expected (late)Actual
Feature freeze1st January 2026(same)22nd January
1st alpha release7 February22nd February25th February
1st beta release1st March1st May
1st release candidate15th April15th May
Release1st May1st June

OCaml 5.4.0

ReleaseExpected (early)Expected (late)Actual
Feature freeze15th April 2025(same)22nd April
1st beta release15th May15th June22nd July
1st release candidate15th June15th July29th September
Release21st June1st August9th October

OCaml 5.3.0

PhaseExpected (early)Expected (late)Actual
Feature freeze15 August 2024(same)25 August 2024
1st beta release10th September15th October7th November
1st release candidate1st October7th November18th December
Release7th October21st November8 January 2025

LTS version

OCaml 4.14.3

PhaseExpected (early)Expected (late)Actual
1st release candidate2 May22 May
Release9 May1 June