Two digit year to four digit year for date making

[Ellie Yang]

Hello Statalist, I need to use "gen start_date = mdy(month, day, year)" to get a date var. However, the year column is two digits (17) rather than four (2017), which renders the code "mdy" invalid. Is there any way I can change the year column from "17" to "2017"? Tks!

* Example generated by -dataex-. To install: ssc install dataex
clear
input byte(month2 day year)
. .  .
. .  .
. .  .
. .  .
. .  .
. .  .
. .  .
. .  .
. .  .
. .  .
3 4 17
3 4 17
. .  .
. .  .
. .  .
. .  .
3 4 17
3 4 17
3 4 17
3 4 17
3 4 17
3 4 17
3 4 17
3 4 17
3 4 17
. .  .
. .  .
. .  .
. .  .
3 4 17
. .  .
3 4 17
. .  .
3 4 17
3 4 17
. .  .
. .  .
. .  .
. .  .
3 4 17
. .  .
. .  .
. .  .
end

[Joseph Coveney]

generate int start_dt = mdy(month2, day, 2000 + year)
format *_dt %tdCY-N-D

[Ellie Yang]

Thank you, Joseph. The code works!