Extract only quarter from a date in r

Question

I would like to extract ONLY the quarter from a date, e.g., to get an integer 1 from the date \"2003-02-08\". I have been trying something along this line

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Answer 1

dint package also is suitable for that:

library("dint")
d=as.Date("2015-01-01")
get_quarter(d)

you can find more about this package here.