/** Return a time_t as a human-readable string.
* @param format The format to retrieve the date/time in. See `man 3 strftime`
* for more information. If NULL, "%a %b %d %T %Y" is assumed.
/** Return a time_t as a human-readable string.
* @param format The format to retrieve the date/time in. See `man 3 strftime`
* for more information. If NULL, "%a %b %d %T %Y" is assumed.