Date facts
Monday, May 18, 2026
May 18, 2026 is day 138 of 365, in ISO week 21. There are 227 days left in 2026 after this date.
Weekday
Monday
Calendar weekday
Day of year
138
of 365
ISO week
21
Week-year 2026
Days remaining
227
In 2026
Weeks start on Monday and use ISO week numbers. Monday is week 21 of 2026.