# JULCVT

> [HTML Version](julcvt_sbr.htm)

_Updated September 2017_

**xcall JULCVT, sepdat, juldat, flag \{,status\}**

JULCVT converts between a separated date format and Julian date format.  

**Parameters**

sepdate  ([Num](num.md))  \[in/out\]

is the date to convert to Julian (if _flag_ = 0), or the return date (if _flag_ = 1). It is in AMOS "separated" format, typically mapped as follows:

MAP1 sepdate,B,4

MAP1 sepdateX,@sepdate

   MAP2 mon,B,1         \! Month (1-12)

   MAP2 day,B,1         \! Day of month (1-31)

   MAP2 yr,B,1          \! Offset from 1900 (2023=123)

   MAP2 dow,B,1         \! Day of week (Mon=0, Sun=6)



Note that sepdate can be of any numeric type large enough to hold a 32 bit integer, but you would need to assign it to an overlay as in the map statements above in order to easily split out the individual fields.

_juldat_  ([Num](num.md))

is the Julian date equivalent of _sepdate_ (if _flag_ = 0) or the date to convert to separated format (if _flag_ = 1). This is the number of days since "The Beginning" (about 4716 BC).

_flag  _([Num](num.md))  \[in\]

should be set to 0 to convert from _sepdate_ to _juldat_, else 1 to convert the other way.

_status  _([Num](num.md))  \[out\]

returns 0 in all cases. This is essentially a dummy variable here to match a legacy version of this routine under AMOS.

**Comments**

The BASIC system variable DATE can be used to set _sepdat _to the current date (i.e. sepdat = DATE).

**See Also**

•	[GRECNV](grecnv_sbr.md) and [DATES](datessbr.md) for other date conversion routines.