Overview
Essential for European business and manufacturing schedules.
Week Number Calculator
Find the ISO-8601 week number for any given date.
Week Number Tool
ISO week calculation.
Day of WeekThursday
Day of Year57 / 365
Week NumberWeek 9
QuarterQ1
Days in Month28
Leap Year?NO (365)
Friday the 13ths in 2026
FebruaryMarchNovember