PIP Paid early??

Hey everyone

My PIP is usually due on a Friday and my next payment was due Friday 2nd of January which isn't a bank holiday, For some odd reason my PIP was paid into my bank today and I was curious as to why?

I've tried calling the helpline but the queue time is pretty insane.

I know if the payment falls on a bank holiday they pay it early but mine wasn't due on a bank holiday.

Any advice would be greatly appreciated

Thanks