Subroutine TIMINC(Line,Incmod)
C ROUTINE TO ADD OR SUBTRACT TIME
	BYTE LINE(84)
	INTEGER INCMOD
C INCMOD = 1 FOR DAY
C	 = 2 FOR WEEK
C	 = 3 FOR MONTH
C	 = 4 FOR YEAR
C FORMAT IS
C  +NN OR -NN : ADD/SUBTRACT NN DEFAULT UNITS
C  +/- NNU (U=D,W,M,Y) TO ADD/SUBT THAT UNIT
	INTEGER IDYR,IDMO,IDDY
	COMMON/DEFDAT/IDYR,IDMO,IDDY
C OUTPUT IN DEFDAT
	INTEGER ML(14)
C LENGTH OF MONTHS
	INTEGER L(12)
	EQUIVALENCE(L(1),ML(2))
	DATA ML/31,31,28,31,30,31,30,31,31,30,31,30,31,31/
C ML IS 14 LONG TO ALLOW REFS OUT OF BOUNDS TO L FOR NO.
C DAYS IN MONTH...
	ISIGN=1
	IF(LINE(1).EQ.'-')ISIGN=-1
C SQUASH LINE DOWN AND MAKE SURE UPPER CASE
	DO 1 N=1,83
	LL=LINE(N+1)
	IF(LL.GT.97)LL=LL-32
1	LINE(N)=LL
	LINE(84)=0
C SCAN FOR D,W,M,Y FOR UNITS
	DO 2 N=1,80
	IF(LINE(N).EQ.'D')THEN
		INCMOD=1
		LINE(N)=0
		GOTO 3
	ELSE IF (LINE(N).EQ.'W')THEN
		INCMOD=2
		LINE(N)=0
		GOTO 3
	ELSE IF (LINE(N).EQ.'M')THEN
		INCMOD=3
		LINE(N)=0
		GOTO 3
	ELSE IF (LINE(N).EQ.'Y')THEN
		INCMOD=4
		LINE(N)=0
		GOTO 3
	END IF
2	CONTINUE
3	CONTINUE
C NOW GRAB OFF DIGITS...
	MAGN=0
C MAGN GETS MAGNITUDE TO GRAB
	DO 4 N=1,80
	LL=LINE(N)
	IF(LL.EQ.32)GOTO 4
	IF(LL.GE.48.AND.LL.LE.57) THEN
		MAGN=10*MAGN+(LL-48)	
	ELSE
		GOTO 5
	END IF
4	CONTINUE
5	CONTINUE
	IF(MAGN.EQ.0)MAGN=1
C MAGN NOW HAS MAGNITUDE, ISIGN HAS SIGN AND INCMOD HAS TYPE OF
C INCREMENT.
	IF(INCMOD.LE.2) THEN
		INCTYP=1
	ELSE
		INCTYP=INCMOD-1
	END IF
C INCTYP IS 1 FOR DAY OR WEEK, 2 FOR MONTH, 3 FOR YEAR
	IF(INCMOD.EQ.2)MAGN=MAGN*7
C ADJUST WEEKS AS BEING 7 * DAYS AND TREAT TOGETHER
	IF(INCTYP.EQ.1)THEN
		IDDY=IDDY+ISIGN*MAGN
C LOOP POINT IF WE MOVE FORWARD
100		IF(IDDY.GT.L(IDMO)) THEN
		  LYD=0
C ACCOUNT FOR LEAP YEARS WHERE FEBRUARY IS 29 DAYS LONG...
		  IF(4*(IDYR/4).EQ.IDYR.AND.IDMO.EQ.2)LYD=1
		  IDDY=IDDY-L(IDMO)-LYD
		  IDMO=IDMO+1
		  IF(IDMO.GT.12)THEN
		    IDMO=1
		    IDYR=IDYR+1
		  END IF
		  GOTO 100
		END IF
C LOOP POINT IF WE MOVE BACK
110		IF(IDDY.LE.0)THEN
C ACCOUNT FOR LEAP YEARS. NOTE ML IS PREV MONTH SO CHECK DEF MO=3
		  LYD=0
		  IF(4*(IDYR/4).EQ.IDYR.AND.IDMO.EQ.3)LYD=1
		  IDDY=IDDY+ML(IDMO)+LYD
		  IDMO=IDMO-1
		  IF(IDMO.LE.0)THEN
		    IDMO=12
		    IDYR=IDYR-1
		  END IF
		  GOTO 110
		END IF
	ELSE IF(INCTYP.EQ.2)THEN
		IDMO=IDMO+ISIGN*MAGN
200		IF(IDMO.GT.12)THEN
		  IDMO=IDMO-12
		  IDYR=IDYR+1
		  GOTO 200
		END IF
300		IF(IDMO.LE.0)THEN
		  IDMO=IDMO+12
		  IDYR=IDYR-1
		  GOTO 300
		END IF
	ELSE IF(INCTYP.EQ.3)THEN
		IDYR=IDYR+ISIGN*MAGN
	END IF
	RETURN
	END