How to change a currennt date time

[ranorga]

Dear Community:

I am trying to transform a current date and time to a date and time value rounded to the lower hour, that is: If the current date and time is 09/03/2021 10:42:13, in the app field it should be written 09/03/2021 10:00:00.
Some of you know how to do it. Thank you in advance for your help.

Regards.