ELI5: Explain Like I'm 5


Week is a part of a bigger unit of time called 'year'. In a year, there are 52 weeks (or sometimes 53) in total. One week is 7 days long. We use weeks to measure and organize our lives, such as when to go to school or when to go on vacation. For example, if your birthday is on the 20th of April, then your birthday will come around again every 7 days.