Gregorian Calendar New Year 2025. In 45 b.c., new year’s day was celebrated on january 1 for the first time in history when the julian calendar took effect (thanks to julius caesar’s reforms). Here are the coinciding secular dates for the upcoming years:

Check upcoming special islamic days and dates in the gregorian calendar 2025. New year’s day 2025 falls on the 1st of january each year and marks the commencement of the gregorian calendar.