cal_to_jd

Converts from a supported calendar to Julian Day Count

&reftitle.description; `int` `cal_to_jd` `int` `calendar` `int` `month` `int` `day` `int` `year`

`cal_to_jd` calculates the Julian day count for a date in the specified `calendar`. Supported `calendar`s are `CAL_GREGORIAN`, `CAL_JULIAN`, `CAL_JEWISH` and `CAL_FRENCH`.

&reftitle.parameters;

`calendar`

- Calendar to convert from, one of `CAL_GREGORIAN`, `CAL_JULIAN`, `CAL_JEWISH` or `CAL_FRENCH`.

`month`

- The month as a number, the valid range depends on the `calendar`

`day`

- The day as a number, the valid range depends on the `calendar`

`year`

- The year as a number, the valid range depends on the `calendar`

&reftitle.returnvalues;

A Julian Day number.

&reftitle.seealso;

- `cal_from_jd`
- `frenchtojd`
- `gregoriantojd`
- `jewishtojd`
- `juliantojd`
- `unixtojd`