[wp-hackers] wp releases : is it planned in any way ?

[Malaiac]

the question may be rude, pardon my french (actually, I'm french)

I just wanted to know if the release calendar is planned, with a
"submit your changes before" date, a "don't bother if it's not
critical" date, and an actual release date...
or ... if it was more like "stuff it till it cries", then release ?
or.. maybe all the planned tickets have to be resolved before release ?

M