Finish the sentences in such a way it means the same as one given

Finish the sentences in such a way it means the same as one given
1. There is a traditon in my family of having lunch together on the second day of Tet
-> According to...
2. You aren't allowed to wear your hat when oing inside the worship places
-> You must...
3. A lot of Vietnamese people have the custom of buying sugar canes on New Year's Eve
-> It's the...