Hey, I've done small research and sharing here, when the halving is about to happen and what parties are being organised:

April 3-5 πŸ‡ΈπŸ‡» πŸŒ‹ San Salvador, Salvador Bitcoin Halving Party https://bitcoinhalvingparty.com/
April 11-14 πŸ‡ΊπŸ‡Έ 🀠 Dallas, Texas USA BitBlockBoom https://bitblockboom.com/bbb/
April 12-13 πŸ‡¬πŸ‡§ 🌽 Bedford CheatCode Conference https://www.cheatcode.co.uk/
April 13-14 πŸ‡¬πŸ‡· 🌊 Santorini, Greece Santorini Halving Party https://loveisbitcoin.com/halvingparty/
April 19-21 πŸ‡΅πŸ‡± πŸ‡ Warsaw, Poland European Halving Party + Bitcoin FilmFest'24 https://europeanhalvingparty.com
April 20-21 πŸ‡«πŸ‡· 🏰 Bretagne, France Halving Party - Citadelle
April 22 πŸ‡ΊπŸ‡Έ 🌴 Miami, Florida USA Bitcoin Energy Summit https://www.eventbrite.com/e/bitcoin-energy-summit-2024-tickets-724317261427
April 27-28 πŸ‡ΊπŸ‡Έ 🚣 Lake Perris, California USA Halving Party 2024 https://btcpins.com/halving-2024/
We're coming to at least two of them!
https://www.bitcoin.amsterdam/ - APRIL 19TH | 17:00 - 01:00 CEST | POSTHOORNKERK
Yay! Which halving party are you going to?
Why are they on different dates? Shouldn't they be on the same date?
When would it be? ;)
You're right, doing the math now could go wrong.