The following links are to source files containing date routines based onTantzen's Algorithm 199. All files are in Programmer's Workbench (PWB, NX/Edit) format.

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Algol Routines	A file of Algol defines and procedures to manipulate dates (21K).
COBOL-74/85 Working-Storage	COBOL-74 COPY modules for Working-Storage and PERFORM routines to manipulate dates. These will also work with COBOL-85. (18K and 42K).
COBOL-74/85 Procedure Division
WFL "K" Routines	A file of routines that can be included in WFL jobs, similar to the Algol routines (19K). These routines work for '00-03-01 through '99-12-31 in any century. They will also work for 1900-03-01 through 2100-02-28. See the Gregory A-Series ClearPath Technical Journal article that describes this file and the file of sample routines below.
WFL "K" Sample Job	A sample WFL job that exercises the date routines above (25K)
WFL "J" Routines	A file of routines that can be included in WFL jobs, similar to the WFL "K" routines above (21K). These routines work for dates 0001-01-01 through at least 9999-12-31. Dates before 1582-10-15 will be calculated according to the "proleptic" Gregorian calendar.
WFL "J" Sample Job	A sample WFL job that exercises the date routines above (26K)