dayofweek()

Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Provides the number of days since the preceding Sunday, as a timespan.

To convert timespan to int, see Convert timespan to integer.

Syntax

dayofweek(date)

Name	Type	Required	Description
date	`datetime`	✔️	The datetime for which to determine the day of week.

Returns the timespan since midnight at the beginning of the preceding Sunday, rounded down to an integer number of days.

The follow example shows how to extract the day of the week from a specified datetime value.

print
Timespan = dayofweek(datetime(1947-11-30 10:00:05))

Output

Timespan
00:00:00

The following example returns 1, indicating that the specified datetime is a Monday.

print
Timespan = dayofweek(datetime(1970-05-11))

Output

Timespan
1.00:00:00

The following example returns the number of days both as a timespan and as data type int.

let dow=dayofweek(datetime(1970-5-12));
print Timespan = dow, Integer = toint(dow/1d)

Output

Timespan	Integer
2.00:00:00	2