Research holidays before you travel. Why? It may make a difference in your train schedule, museum pass, or highway closures.
Check for local and national holidays, parades, religious events, and major conferences. Sometimes banks are closed. Other times, train schedules changes. Some museums change their hours. In smaller towns, shops may be closed on a particular day or holiday.
Or…everyone is on holiday and the trains are full of locals headed to the beach.
If you are concerned about a major holiday, check before you purchase your tickets.