Delay a flow

Sign in to Microsoft Flow, and then select My flows in the top navigation bar.
Select Create from blank.
Specify an event as Create a flow from scratch describes.
Select New step, and then select Add an action.
In the list of actions, do either of the following:

Select Delay, specify a Count, and specify a Unit of time such as second, minute, or hour.
Select Delay until, and then specify a date in this format.
YYYY-MM-DDTHH:MM:SSZ

Source: Microsoft