A common year is a calendar year of exactly 365 days and so is not a leap year. More generally it is a calendar year without intercalation.

A common year of 365 days has exactly 52 weeks and one day, so consequently the next new year is one day of the week later.

• 2001 began on Monday.
• 2002 began on Tuesday.
• 2003 began on Wednesday.
• 2004, a leap year, began on Thursday.
• 2005 began on Saturday.