CL: Numeric padding

Hello,

I want my Save 21 tapes are meant to have a label YYMMDD applied without much manual information. I began to write a CL program like this:

DCL VAR(&TAPDRV) TYPE(*CHAR) LEN(5) VALUE(TAP01)
DCL VAR(&SYSYR) TYPE(*CHAR) LEN(2)
DCL VAR(&SYSMON) TYPE(*CHAR) LEN(2)
DCL VAR(&SYSDAY) TYPE(*CHAR) LEN(2)
DCL VAR(&TAPLBL) TYPE(*CHAR) LEN(6)

RTVSYSVAL SYSVAL(QYEAR) RTNVAR(&SYSYR)
RTVSYSVAL SYSVAL(QMONTH) RTNVAR(&SYSMON)
RTVSYSVAL SYSVAL(QDAY) RTNVAR(&SYSDAY)

CHGVAR VAR(&TAPLBL) VALUE(&SYSYR *CAT &SYSMON *CAT &SYSDAY)

Unfortunately, the system values aren't padded with 0's when single-digit which creates ambiguity.

I could hard code 18 lines of "if day equals 1 then change variable to be 01", and so on. This seems to be pretty ugly. How would you solve this in CL(LE)?

Thanks!

:wq! PoC