How many times has January 1 fallen on Monday?

January 1 has fallen on a Monday numerous times, with the most recent occurrences being in 2018 and 2024. The frequency of January 1 falling on a Monday follows a cycle influenced by leap years, generally occurring every 5, 6, or 11 years. Over the 21st century, it will have fallen on a Monday 17 times by the year 2100.