Welcome, time traveler! We're glad you asked for tips on time traveling etiquette. Here's a few things to keep in mind:
When visiting ancient Egypt, it's tempting to try some of that fancy Egyptian cuisine. Resist the urge, friend. You don't want to be the one responsible for the downfall of an empire due to a bad case of food poisoning.
Tip 2: Learn to Hold Your BreathIn medieval castles, it's considered polite to hold your breath while walking up stairs. It's a sign of respect, you see. Don't be that one guy who's always snorting and snuffling like a constipated walrus.
Tip 3: Don't Mention the FutureIn ancient Greece, mentioning the future can be seen as a sign of hubris. Keep your mouth shut about the rise of democracy, the Olympics, or any other 'minor' historical events. You don't want to get yourself turned into a human statue, do you?