STRPTIME only returning 0


#1

I have been playing with STRPTIME to get unixtime of a readable time and I only getting 0 or an error.

exten => _+1NXXNXXXXXX,n,Set(startTime=${STRPTIME(2006-03-01 07:30:35,America/Chicago,%Y-%m-%d %H:%M:%S)})
The above is the example from the docs
https://wiki.asterisk.org/wiki/display/AST/Asterisk+16+Function_STRPTIME

the following is the result
Executing [+13XNXXXXXX@inbound:8] Set("PJSIP/carrier-00000040", "startTime=0") in new stack

Thoughts?