Recognised as Month
January 2018
- January 2018
- 31 days
- 23 working days
- Q1
January 2018 had 31 days, beginning on a Monday and ending on a Wednesday. It contained 23 working days and 8 weekend days, spanning ISO weeks 1 to 5, and fell in Q1 of 2018.
The month
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January 2018, weeks starting Monday. Weekends highlighted.
Month number1 of 12
Days31
First dayMonday, 1 January 2018
Last dayWednesday, 31 January 2018
QuarterQ1
Days before it in the year0
Day-of-year range1 to 31
Share of the year8.493%≈
Weeks and working days
Working days23Monday to Friday, ignoring public holidays, which vary by country and change
Weekend days8
ISO weeks spannedWeeks 1 to 5
Full weeks4and 3 days over
Sundays4
Mondays5
Tuesdays5
Wednesdays5
Thursdays4
Fridays4
Saturdays4
Position in the year
Reference numbers
Unix timestamp of the 1st1,514,764,800midnight UTC
Unix timestamp of the last day1,517,356,800midnight UTC
Seconds in the month2,678,400ignoring leap seconds
Julian Day Number of the 1st2,458,120
Hebrew14 Tevet 5778the 1st of this month in the Hebrew calendar
Islamic (tabular)13 Rabi II 1439 AHthe tabular reckoning, not the observational calendar in religious use
Relative to today
These values depend on today’s date and change daily.
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Adjacent months
January in other years
Days of the month
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