So, I'm rewatching What-If and I'm thinking for my own timeline, I might switch some things up with Fury's Big Week. Whether you go with the Prelude comic and the old Marvel timeline (which I believe is outdated anyway) or the What-If episode, there are some contradictions. But, I personally feel like What-If takes precedent over the comic. This is what I've come up with based on What-If.
Sunday, May 29th- Tony's birthday. This is concrete and matches with What-If telling us the next day is Monday.
Monday, May 30th- Fury finds Tony at Randy's Donuts, Tony goes through his dad's files, Bruce arrives at Culver University, Tony meets with Pepper in her office, and Coulson leaves for New Mexico. That night, Coulson stops the robbery at the gas station and Thor arrives on Earth. Coulson is wearing the same tie when he's given the detail to watch Tony and when he tells him he's leaving for New Mexico, so for this, all to be the same day isn't too big a stretch.
Tuesday, May 31st- Coulson arrives in New Mexico, Bruce pretends to be a Pizza Delivery driver, Thor tries to steal Mjolnir off the SHIELD base, and back in New York, Tony and Rhodes face off against Vanko at the Stark Expo.
Wednesday, June 1st- Thor battles against the Destroyer and returns to Asgard, Bruce faces off against Ross at Culver University, Fury makes Tony a consultant where we can see the news report discussing Culver University.
Thursday, June 2nd- Bruce and Betty hide out at the hotel.
Friday, June 3rd- Harlem Battle.
Going off just the movies and What-If, I believe this works as the actual movies are vaguer on when certain events in other movies happen throughout the week. There are plenty of contradictions when you consider the Prelude comic, but like I said I personally feel like What-If would be more accurate. I know there's the excuse that What-If is an alternate universe, but I don't see how the nexus event of Hope's death would cause events like when Thor tried to get Mjolnir and when Bruce went against Ross to happen on different days.
I'm not asking for any changes to be made here, just thought I'd share.