How can I change my date format from 12am\pm to 24h? 

The date formatting is set by the locale on your language pack. There is no specific setting for this.

• I have Ru language pack but 12 am\pm format (

Hi. You can check this key, I'm not sure it solves the problem

_time_format_hhmm

It must be

HH:MM

This setting is right

47 minutes ago, Vizart21 said:

This setting is right

As mentioned, this is actually dictated by the locale being used in a lot of places. Changing this would require customisation