# System Parameters

'BY'= | Base Year

## Description

Defines the base year for the JUL( ) and DTE( ) functions.

## Default

'BY'=1970

#### Note:
The JUL( ) function uses January 1 of the base year as day 0 (zero).
In addition, if you SET_PARAM 'BY'=0 (zero), the JUL( ) and DTE( ) functions operate under the Julian calendar where day 0 is around 4713 BC.

## See Also

JUL( ) Return Julian Date
DTE( ) Convert Date