First day of 'week' date

Languages Application language
1 
		'week': text ~> ^ .'Kalender'.'Kalender'.'Weken'[]
		'van': number 'datum' @default: from 'datum en tijd' now
		'tot': number 'datum' = add ( .'van', ^ .'Presets'.'weekdagen' )

kalender
kalender826×225 27.2 KB

is it possible to fill attribute ‘van’ filled with the date of the first day of ‘week’ ?
for now ‘van’ will be (first time) filled with the current date, but I would like it when it would be filled with the the date of the first day of the selected ‘week’

2

Are you using our standard ‘calendar’ interface to retrieve data about years, weeks and days? Because that interface already contains a reference 'Eerste dag' on every entry from the collection 'Weken' which you can use to get to a number property with the actual date (or datetime, in midnight UTC). That should enable you to perform the rest of your calculations.

3

I am indeed use our standard calendar, i don’t know what version 2022.1 or 2023.1
I know there there is a reference eerst day, but I want that date placed in ‘van’ but I don’t know how.

4

Use something like this:

'van': number 'datum' @default: >'week'>'Eerste dag'>'Dag van de maand'.'Datum'

This is based on our 2023.1 calendar interface. It could be slightly different in your application, but the general idea is the same.