When should I pay in to a savings account if it says monthly?

[AllBranEater]

I've just started a savings account where you save up to £200 a month for 12 months. So I was wondering what dates I should pay in? I think I made the first payment on 24th December.
TIA

I have a standing order set up so it pays into mine the day after my pay day, when I have most in my account.

Try 24th of every subsequent month? Would that be a good fit for you. Regular date via standing order?
Ask bank for advice?

Any date within each month is fine.

Many people do it on the same day each month, either by standing order or transfer, but there's no rule.

Read the terms it came with. I have an online saver and it wants the payments before the middle of each month, so I pay it in on the 1st. I'm not sure what it would do to the interest earned if I paid it in at the end of each month.

Thanks all - I asked on internet banking and they were helpful.