Hi, you can set up Default logic that rounds the input to the desired times.

declare @datetime datetime2(0) = sysutcdatetime()

-- Strip seconds
set @datetime = dateadd(second, -datepart(second, @datetime), @datetime)

-- Round down to last quarter hour
set @datetime = dateadd(minute, -datepart(minute, @datetime) % 15, @datetime)

select @datetime

Edit: I’ve been tinkering with this a bit; you can even make it quicker by simply taking the minutes since the base date (0 - 1900-01-01), dividing them by 15 (effectively rounding down), multiplying them by 15 again and adding them to the base date again.

declare @datetime datetime2 = sysutcdatetime()

-- Add rounded-down full quarter hours since base date to the base data
set @datetime = dateadd(minute, datediff(minute, 0, @datetime) / 15 * 15, 0)

select @datetime

Downside is that quarter hours before the year 1900 are rounded up 

Awesome! Thanks for the quick reply. I will forward this information to my team.

​@Anne Buit Thanks again for the response.

But the wish is to have controle of what the user can input. We want the user to only see 00, 15, 30 and 45 in the minute dail. Is that possible?

This is currently not possible with a datetime picker. You’d need to set up a date picker and have a subsequent hour-picker combobox and quarter-hour-picker combobox.

Feel free to submit an idea in the Ideas section to allow for configuration of the steps in a time or datetime picker like this.