Converts a date from the French Republican Calendar to a Julian Day Count

# frenchtojd

(PHP 4, PHP 5, PHP 7, PHP 8)

frenchtojd — Converts a date from the French Republican Calendar to a Julian Day Count

### Description

frenchtojd(int `$month`, int `$day`, int `$year`): int

Converts a date from the French Republican Calendar to a Julian Day Count.

These routines only convert dates in years 1 through 14 (Gregorian dates 22 September 1792 through 22 September 1806). This more than covers the period when the calendar was in use.

### Parameters

`month`

  The month as a number from 1 (for Vendémiaire) to 13 (for the period of 5-6 days at the end of each year)

`day`

  The day as a number from 1 to 30

`year`

  The year as a number between 1 and 14

### Return Values

The julian day for the given french revolution date as an integer.

### See Also

- jdtofrench() - Converts a Julian Day Count to the French Republican Calendar
- cal_to_jd() - Converts from a supported calendar to Julian Day Count

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