For an action.
That is just time, bit if you want a date-timestamp, you can just use an insert text action step and use a formatted date tag.
And if you want some premade actions from the directory, my writing action group currently has 21 actions for inserting date and time based stamps in various common formats.
It is part of a suite of action groups, so if you want make use of many of the actions, you’ll also need the suites core action group.
Hope that helps.