Common Date Time formulas for Sharepoint – Calculated Fields

Get Week of the year
=DATE(YEAR([Start Time]),MONTH([Start Time]),DAY([Start Time]))+0.5-WEEKDAY(DATE(YEAR([Start Time]),MONTH([Start Time]),DAY([Start Time])),2)+1
First day of the week for a given date:
=[Start Date]-WEEKDAY([Start Date])+1
Last day of the week for a given date:
=[End Date]+7-WEEKDAY([End Date])
First day of the month for a given date:
=DATEVALUE(“1/”&MONTH([Start Date])&”/”&YEAR([Start Date]))
Last day of the month for a given year (does not handle Feb 29). Result is in date format:
=DATEVALUE (CHOOSE(MONTH([End Date]),31,28,31,30,31,30,31,31,30,31,30,31) &”/” & MONTH([End Date])&”/”&YEAR([End Date]))
Day Name of the week : e.g Monday, Mon
=TEXT(WEEKDAY([Start Date]), “dddd”)
=TEXT(WEEKDAY([Start Date]), “ddd”)

The name of the month for a given date – numbered for sorting – e.g. 01. January:
=CHOOSE(MONTH([Date Created]),”01. January”, “02. February”, “03. March”, “04. April”, “05. May” , “06. June” , “07. July” , “08. August” , “09. September” , “10. October” , “11. November” , “12. December”)
Get Hours difference between two Date-Time :
=IF(NOT(ISBLANK([End Time])),([End Time]-[Start Time])*24,0)
Date Difference in days – Hours – Min format : e.g 4days 5hours 10min :
=YEAR(Today)-YEAR(Created)-IF(OR(MONTH(Today)<MONTH(Created),AND(MONTH(Today)=MONTH(Created),
DAY(Today)<DAY(Created))),1,0)&” years, “&MONTH(Today)-MONTH(Created)+IF(AND(MONTH(Today)
<=MONTH(Created),DAY(Today)<DAY(Created)),11,IF(AND(MONTH(Today)<MONTH(Created),DAY(Today)
>=DAY(Created)),12,IF(AND(MONTH(Today)>MONTH(Created),DAY(Today)<DAY(Created)),-1)))&” months,
“&Today-DATE(YEAR(Today),MONTH(Today)-IF(DAY(Today)<DAY(Created),1,0),DAY(Created))&” days”

Calculated Column - Add x days to created date, excluding weekends.


Overview

Say a user creates a item in a list and they have 3 (working days) to to mark it as completed, how do we do this?

1. Create a new field in the list (calculated field of type date and time), lets call it "escalate date", then using this formula.

=IF(Weekday([Modified])>3, [Modified]+5, IF(Weekday([Modified])>1,[Modified]+3, [Modified]+4))

2. Create a workflow that starts on item created and changed, that pauses until the "escalate date", once that date is reached, workflow checks if item was marked as completed or not.


Explanation of Weekday.

Using Weekday, we can determine which day of the week the share point list item was created and add 3 working days to a calculated column.


WeekdayReturnsDays to addEscalate Date
Sunday1+4Thursday
Monday2+3Thursday
Tuesday3+3Friday
Wednesday4+5Monday
Thursday5+5Tuesday
Friday6+5Wednesday
Saturday7+5Thursday

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