Always greet with a smile and a warm “Salaam!” which means peace. It’s an easy enough word to learna dn the best way to start any conversation. Locals truly appreciate the effort.
When in doubt, dress modestly, especially in traditional areas. Covering shoulders and knees is the norm, and it shows respect for local customs. For women, carrying a scarf to cover your head is a good idea, in case you want to enter any mosques or holy sites. Now this isn't necessarily the case everywhere - nightlife in Cairo, walking the marina in Dubai, or heading to the beach in Dahab - there's plenty of diversity in what people wear across the region and for what occasions.
Accepting tea or coffee is a sign of friendship. Even if you’re not thirsty, sharing a cup is about hospitality, so take time to enjoy the moment - even just a sip if it's really not your thing. It's also not that serious if you say no, so don't feel like you'll make a cultural faux pas by declining.
Fridays are the main day of rest and prayer. Expect slower mornings and many shops to open later. In some countries, like Egypt and Saudi Arabia, the work week is from Sunday to Thursday, so Friday is the first day of the weekend.