The Sims 4 Royalty & Legacy Grand Bundle

I'm a bit confused about the deadline for Regal Treasures Digital Content, The Sims 4 Tea Time Solarium Kit, and The Sims 4 Silver Screen Style Kit in this bundle.

If I purchase Royalty & Legacy on 15th March will the bundle still be available and if so until what time and in what time zone? I live in the UK and Sims normally goes by one of the American time zones, right?

I have a convention that weekend and I want to make sure I have enough money for that but I don't know if I'll be able to purchase it that Sunday.