Days Vocabulary 7 days = 1 week 15 days = 1 fortight 30 or 31 days = 1 month 365 days = 1 year 366 days = 1 leap year 12 months = 1 year 1 year = Anniversary 10 years = 1 decade 25 years = Silver jubilee 50 years = Golden jubilee 60 years = Diamond jubilee 75 years = Platinum jubilee 100 years = 1 Century @LetsLearnSkills 25.8K views15:06