* DEFINITION

* This a set of math functions that deal with time. The functions accept

* 4-digit time values and 4-digit time of day values. Time values are

* interpreted as hours-minutes and are valid if all digits are numeric and

* 9 or less, except the second-to-last digit must be 5 or less. Time of day

* values are valid if they conform to normally accepted clock values of

* 1:00 to 12:59 for a 12-hour clock or 00:00 to 23:59 for a 24-hour clock.

-* * This a set of math function 's that deal with time. * The functions accept 4-d igit time values and 4-digit time of day values. * Time values are interpreted as hours-minutes and are valid if all digits are numeric and * 9 or l ess. except the second-to-last digit must be five or les s. * Time of day values are valid if they conform t o clock normally accepted values of * 1:00 to 12 : 59 for a 12-hour clock or 00:00 to 23 : 59 for a 24-hour clock.