All times are referenced to Berlin and Paris time.

2019Q4

2020Q1

2020-01-07: Release 4.2 (Firefox 68.4, bugfix release, with one exception — intrigeri is the RM)
- Support for Endless automatic upgrades in Tails Upgrader
- Automatic upgrade from 4.0 and 4.1, using the old upgrade system
2020-02-11: Release 4.3 (Firefox 68.5, bugfix release — intrigeri is the RM)

Automatic upgrade from 4.2, using the new upgrade system (but still with an aufs-based diff).

From now on, users of Tails << 4.2 must first automatically upgrade to 4.2, before they can automatically upgrade to the current 4.x. Alternatively, they can do a manual upgrade. UX will tell RMs which of these options we should advertise.
2020-03-10: Release 4.4 (Firefox 68.6, bugfix release)

Automatic upgrade from 4.2 and newer (still with aufs-based diff).
2020-03-21: potential emergency release that traditionally follows pwn2own (March 18-20)
late 2020-03: Release 4.5~rc1
- Switch to overlayfs (#8415)
- If GRUB and Secure Boot are ready to ship as well: awesome! Otherwise, we'll need another major release by the end of July.
- Automatic upgrade from 4.2 and newer (now with overlayfs-based diff).
2020-03-31: Fundraising: Prototypefund 8th round

2020-04-07: Release 4.5 (Firefox 68.7, major release)

Automatic upgrade from 4.2 and newer (with overlayfs-based diff).
2020-05-05: Release 4.6 (Firefox 68.8)
2020-06-02: Release 4.7 (Firefox 68.9)
2020-06-30: Release 4.8 (Firefox 68.10)