About a week before the day we get two phone calls in our house.
Mine, from my mum, is usually all about the usual things we talk about but at some point in it she will say "By the way, don't go wasting your money next week, I don't want anything. What are you doing, do you have plans?"
DH's call, from his parents, goes along the lines of "MIL is very upset this year, she wants this (insert gift request) and wants to know when you are coming to see her and how long you are staying, and can you do this as well, and also wants you to come on this day as well as the other day you planned to come, she's very upset so don't let her down..."
Mother's day for MIL this year also took place on Tuesday and on Saturday as well as today. Tuesday required a four hour visit from DH, Saturday was two and a half hours, today has needed four telephone calls (so far), a delivery of flowers, cards, a present DH was ordered to buy her and a bottle of wine. That's just from us, she has three other adult children, and she's still upset that DH hasn't been to see her today.
Mother's day for my mum involved an hour's visit yesterday, a quick trip to Tesco since we were in the car, a book and card (plus a quick telling off for me because she'd told me not to) and a phone call earlier just to say hello.
I've been quite lucky today, I got a card DS made at school, a box of chocolates and some flowers and DH cooked dinner. Now he's gone to bed for a bit so I'll be doing the washing up. I'd have been happy with just the card, but the rest has been lovely.
I wouldn't say anyone has had 'priority' as such, although MIL has demanded it. all week.