Since Covid- Days and weeks I traveled to 14 countries in 2021 when most of the world was still on lock down. The entry requirements were different in every country and changed every few days, so there was no way you plan too ahead. I booked my trip from Jordan to Cyprus only 5 days in advance and things still changed on after 3 days, I almost didn’t make it. I only book very few things 2+ months in advance — eg MCPC tickets, Day of the Dead accommodations & buses to Oaxaca.