Difference between revisions of "Date formats"

Revision as of 18:33, 9 September 2015

In VistA, dates are usually in FileMan Date Format [1]

Quoting from Hardhats.org:

• VA FileMan's conventional internal format: "YYYMMDD.HHMMSS":
• YYY is number of years since 1700 (hence always 3 digits)
• MM is month number (00-12)
• DD is day number (00-31)
• HH is hour number (00-23)
• MM is minute number (01-59)
• SS is the seconds number (01-59)

This format allows for representation of imprecise dates like JULY '78 or 1978 (which would be equivalent to 2780700 and 2780000, respectively).

Dates are always returned as a canonic number (no trailing zeroes after the decimal).

• Today's date is usually available while VistA is running in the variable DT in FileMan format.

Mumps has the $Horolog intrinsic variable [2]

• $H[OROLOG] contains a string value specifying the number of days since "31 December, 1840,"
• and the number of seconds since midnight of date in the time zone of the process, separated by a comma (,)

And Linux has a date command.

GTM>W ! ZSYstem "date" Write "$Horolog="_$H,!,"DT=",DT  

Wed Sep  9 14:29:32 EDT 2015
$Horolog=63804,52172
DT=3150909

--Sherlocksfriend (talk) 12:33, 9 September 2015 (MDT)