The Torygraph speculates this:

The season’s structure will be approximately as follows:

• April and May: two months of County Championship
• June: first bank of Blast action, followed by two rounds of Championship
• July: completion of Blast groups, followed by the start of Hundred and One-Day Cup
• August: Hundred runs until August 18. ODC runs alongside. One round of Championship at end of month
• September: Blast knockouts; ODC final; completion of Championship

Link: [https://web.archive.org/web/20230913124516/https://www.telegraph.co.uk/cricket/2023/09/01/county-championship-will-be-shunted-to-margins-of-summer/]

Seems to fit with Blast Off being announced for 1 June.

Absolutely no mention of the Charlotte Edwards Cup or the Rachael Heyhoe Flint Trophy. It's like the women's teams don't exist. They really need to do better at press releases, especially following the ICEC report.

I know many of you loathe the competition, but I'm pleased that The Hundred finishes around 18 August, because my daughter loves it and we've already booked to go on holiday from the 18th. She missed most of it this year due to being away, so hope she can get to most of the Phoenix games next year.