When to start Uc claim?

Newcad

It can be awkward to get it right for payment on a particular date.

When I migrated myself a couple of years ago  I deliberately avoided month ends and decided that I would like to be paid UC on the 21st of each month.

And then I miscalculated and got it wrong.

21-7 = 14, so I claimed on the 14th, but of course that meant my AP runs 14th-13th each month and I get my UC payments on the 20th not the 21st. (Except for the usual we/bh variation).

Not a great problem but a lesson learned.