Dates for Rstudio

I am trying to set a period of time as a specific quarter to store all the information that occurs during that time to store in that variable. So for example i would have Quarter1 being dates from 01/01/19 - 03/30/19 and all the information that applies to those dates be able to be stored in it.

A post was merged into an existing topic: Creating variables that store a range of dates

Merged into duplicated topic.