PL/SQL Date Functions
This blog post discusses a package of useful date functions, written in PL/SQL.
View the package specification for instructions on how to call the following functions:

util_date package spec
util_date package body
View the package specification for instructions on how to call the following functions:
| UTIL_DATE Functions |
| Function Name |
Description |
| count_day_of_week |
Returns count of occurences of a given weekday between 2 dates. e.g. count all Mondays in a 3 month period. |
| first_day |
Returns date of first day of the specified month,
e.g. first_day(SYSDATE) returns date of first day in current month. |
| month_day_first |
Returns date of month on which the specified day first occurs,
e.g. month_day_first(SYSDATE,5) returns date of first Friday in current month. |
| month_day_last |
Returns date of month on which the specified day last occurs,
e.g. month_day_last(SYSDATE,5) returns date of last Friday in current month. |
| is_a_working_day |
Returns a boolean value TRUE if the date is a working day (not a holiday or weekend), otherwise FALSE. |
| first_workday_month |
Returns date of first working day in the month, excluding holidays and weekends. |
| last_workday_month |
Returns date of last working day in the month, excluding holidays and weekends. |
| working_days |
Returns a count of the number of working days within the specified date range, excluding holidays and weekends. |
| carnival_monday |
Returns the date of Carnival Monday. |
| shrove_tuesday |
Returns the date of Shrove Tuesday. |
| mardi_gras |
Returns the date of Mardi Gras. |
| ash_wednesday |
Returns the date of Ash Wednesday. |
| palm_sunday |
Returns the date of Palm Sunday. |
| good_friday |
Returns the date of Good Friday |
| easter_sunday |
Returns the date of Easter Sunday. |
| easter_monday |
Returns the date of Easter Monday. |
| easter_friday |
Returns the date of first Friday following Easter. |
| easter_saturday |
Returns the date of first Saturday following Easter. |
| ascension_day |
Returns the date of Ascension. |
| whitsun |
Returns the date of Whitsun (Pentecost). |
| whit_monday |
Returns the date of Whit Monday. |
| corpus_christi |
Returns the date of Corpus Christi. |