pc.mt

invokes the time conversion function to convert external time representations to internal format or to convert internal time values to one of a variety of external time formats.

The 'internal' time format is the number of seconds from midnight. The 'external' time is 24-hour military format (e.g., 23:25:59) or 12-hour format (e.g., 11:25:59PM).

For input-conversion, the time is entered with 'AM' or 'PM' immediately following the numeric time. If none is entered, 'AM' is assumed. On output, 'AM' or 'PM' is always printed immediately following the numeric time.

Note: '12:00AM' is considered midnight. '12:00PM' is considered noon. 'AM' and 'PM' are ignored on input if the 'mt' code is specified. Illegal values are converted to null on input.

When used as an input-conversion, the 'mt' code validates the time and converts it to the internal format of seconds from midnight. When updating a field controlled by an 'mt' conversion, the '/' (slash) character can be used to insert the current time into the attribute.

'h' specifies a 12 hour clock. Default is (military) 24 hour clock.

's' includes seconds in output value. If 's' is omitted, seconds are not listed on output.