Main Releases since 2021.
Rel 3.0 : 230 days (lab)
Rel 4.0 : 210 days (sail trip)
Rel 5.0 (ongoing) : 262 days (bar night)
There was a two month break (see patreon post) this time.
Correcting for the two months : 262 days - 2 x 30 days = 202 days (actual development time)
With the release looking in its final stages using the historical pattern does not seem entirely off.
Applying that, a release would occur between 26th march and 15th of April.
Being smaller than the lab release the last weekend in March / first in April seems most realistic.