A built-in CFEngine function in the data category that returns a string.strftime is called 5 times from 3 bundles and bodies in 3 policy files, on 100 hosts in your infrastructure.
Signature
strftime(option, string, int)
Parameters
option Use GMT or local time (gmtime,localtime)
string A format string (.*)
int The time as a Unix epoch offset (0,99999999999)