# d(yyyy,mm,dd)

Convert a Gregorian date in numeric form to its equivalent Julian day number.

## Syntax

`integer d(integer year,integer month, integer day)`

## Parameters

- year
- Four-digit year (for example, 2013).
- month
- Two-digit month value (from 01 to 12).
- day
- Two-digit day value (from 01 to 31).

## Return Value

Returns the equivalent Julian day number.