Historical clue formulations

• Home of Si Racha, where the hot sauce was invented — 2025-02-09
• Where things can be bought with baht — 2024-07-08
• Where Songkran is a national New Year's holiday — 2022-07-08
• It was once Siam — 2006-10-09
• Monarchy since 1350 — 2005-04-23