calendar.md

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

Release	Expected (early)	Expected (late)	Actual
Feature freeze	1st January 2027
Release	1st April 2027

OCaml 5.6.0

Release	Expected (early)	Expected (late)	Actual
Feature freeze	1st August 2026	1st September 2026
Release	1st October	1st December

OCaml 5.5.0

Release	Expected (early)	Expected (late)	Actual
Feature freeze	1st January 2026	(same)	22nd January
1st alpha release	7 February	22nd February	25th February
1st beta release	1st March	1st May
1st release candidate	15th April	15th May
Release	1st May	1st June

OCaml 5.4.0

Release	Expected (early)	Expected (late)	Actual
Feature freeze	15th April 2025	(same)	22nd April
1st beta release	15th May	15th June	22nd July
1st release candidate	15th June	15th July	29th September
Release	21st June	1st August	9th October

OCaml 5.3.0

Phase	Expected (early)	Expected (late)	Actual
Feature freeze	15 August 2024	(same)	25 August 2024
1st beta release	10th September	15th October	7th November
1st release candidate	1st October	7th November	18th December
Release	7th October	21st November	8 January 2025

LTS version

OCaml 4.14.3

Phase	Expected (early)	Expected (late)	Actual
1st release candidate	2 May	22 May
Release	9 May	1 June