Summary: Does vault 101 have any special holidays? How do they look upon days off and their jobs?
Vault 101 doesn't have many holidays. On the big whole there is only three holidays that counts in the vault, which is:
The Overseer's Day - a celebration to the honor of the overseer, where every family have to bring some food to the big dining room to share with others. This way there can be a big feast, where everyone has contributed something. People also have to say how much they appreciate the overseer. This is not a day off, as the inhabitants is required to tend to their duties at their usual times as well as cooking the meal to the big meal and tend to the feast.
The Annual Cooking/Baking contest - a contest where anyone over 15 years of age can join in and bake or cook. The overseer is the judge and crowns a winner. This is not a day off, as the inhabitants are required to tend to their duties at their usual times as well as coking to the contest.
Vault 101 Creation Day - a day where the inhabitants of vault 101 celebrate the day the vault was built. This is the only day off in the entire vault for the entirety of the year.
On all day except for the Vault 101 Creation Day people have to work, as too much free time is frown upon in the vault. The jobs of a inhabitant is looked upon as the greatest privilege they can have, and that it must be preformed over anything else. Therefor they don't have any but one day off in the entire year.
Summary: What does the people in the vault use as currency?
There is not much of a currency in the vault. The closest thing to money in the vault is food coupons, which every person get as "pay" after their work. The amount of coupons vary depending on what type of work they do. Different food items "cost" differently in the way of coupons, too.
When it comes to other items than food people trades them with each other. There is no particular trade system to rule by, people in the vault just trade things with other things that have about the same value.