datetime/getcalendarweek
getcalendarweek (Get Calendar Week (ISO Week Number)) is a 1001fx API function in the group Date & time: POST https://api.1001fx.com/datetime/getcalendarweek, 1 credit per call. It works as a ready-made module in Make or as a plain HTTP call.
Returns the ISO 8601 calendar week of a date (week starts on Monday, week 1 contains the first Thursday), the week-based year, the first and last day of the week, the weekday, month and quarter.
https://api.1001fx.com/datetime/getcalendarweekX-API-KEY: YOURSECRETAPIKEY How toapplication/jsondatestringrequirede.g. 2026-11-01 or 01.11.2026.
Get Calendar Week (ISO Week Number)
Input
{
"date": "2026-11-01"
}Output · HTTP 200
{
"statusCode": 200
}curl -X POST 'https://api.1001fx.com/datetime/getcalendarweek' \
-H 'X-API-KEY: YOURSECRETAPIKEY' \
-H 'Content-Type: application/json' \
-d '{"date":"2026-11-01"}'Run it in your browser or create a free account and get 100 credits every month.