Template:Date demo

Differences between Template:YMD2MJD and Template:Gsd (seems fine, the latter works for all years and is Gregorian even before 250).

{{Date demo|-4712|1|2|=}} gives -678612, MJD = JD + 2400000.5

{{Date demo|-100|02|29|=}} gives -678577, proleptic Julian leap year

{{Date demo|-100|03|01|=}} gives -678576, March 1, 101 BC

{{Date demo|0000|12|31|=}} gives -678576, Astronomical year numbering

{{Date demo|0001|01|01|=}} gives -678576, begin Common Era

{{Date demo|0200|02|29|=}} gives -678575, this and earlier dates are Julian

{{Date demo|0200|03|01|=}} gives -678574, first Julian = Gregorian date

{{Date demo|0300|02|28|=}} gives -678576, last Julian = Gregorian date

{{Date demo|0300|03|01|=}} gives -678576, this and later dates are Gregorian

{{Date demo|1858|11|17|=}} gives -678576, begin of MJD epoch

{{Date demo|1900|02|28|=}} gives -678576, last day of February 1900

{{Date demo|1900|02|29|=}} gives -678576, bogey but okay

{{Date demo|1900|03|01|=}} gives -678576, no leap year

{{Date demo|1900|02|30|=}} gives -678576, bogey but okay

{{Date demo|1900|03|02|=}} gives -678576

{{Date demo|1995|09|27|=}} gives -678576, USNO test date (49987)

{{Date demo|2000|02|29|=}} gives -678576, last day of February 2000

{{Date demo|2000|02|30|=}} gives -678576, bogey but okay

{{Date demo|2000|03|01|=}} gives -678576, leap year

{{Date demo|2000|02|31|=}} gives -678576, bogey but okay

{{Date demo|2000|03|02|=}} gives -678576

{{Date demo|2024|12|25|=}} gives -678576 = "{{Date demo|=}}" gives "" [1]

Code	Result	MJD	JD	REXX
{{Date demo|0000|03|01}} =	-678576	-678881	1721119.5	-306
{{Date demo|0001|01|31}} =	-678576	-678545	1721455.5	30
{{Date demo|0001|02|01}} =	-678576	-678544	1721456.5	31
{{Date demo|0001|02|28}} =	-678576	-678517	1721483.5	58
{{Date demo|0001|03|01}} =	-678576	-678516	1721484.5	59
{{Date demo|0001|08|31}} =	-678576	-678333	1721667.5	242
{{Date demo|0001|09|01}} =	-678576	-678332	1721668.5	243
{{Date demo|0004|02|29}} =	-678576	-677421	1722579.5	1154
{{Date demo|0004|03|01}} =	-678576	-677420	1722580.5	1155
{{Date demo|1259|03|02}} =	-678576	-219040	2180960.5	459535
{{Date demo|1516|12|30}} =	-678576	-124870	2275130.5	553705
{{Date demo|1582|10|15}} =	-678576	-100840	2299160.5	577735
{{Date demo|1752|09|14}} =	-678576	-38779	2361221.5	639796
{{Date demo|1858|11|17}} =	-678576	0	2400000.5	678575
{{Date demo|1895|02|28}} =	-678576	13252	2413252.5	691827
{{Date demo|1895|03|01}} =	-678576	13253	2413253.5	691828
{{Date demo|1896|02|29}} =	-678576	13618	2413618.5	692193
{{Date demo|1896|03|01}} =	-678576	13619	2413619.5	692194
{{Date demo|1900|02|28}} =	-678576	15078	2415078.5	693653
{{Date demo|1900|03|01}} =	-678576	15079	2415079.5	693654
{{Date demo|1970|01|01}} =	-678576	40587	2440587.5	719162
{{Date demo|1977|01|01}} =	-678576	43144	2443144.5	721719
{{Date demo|2000|02|29}} =	-678576	51603	2451603.5	730178
{{Date demo|2000|03|01}} =	-678576	51604	2451604.5	730179
{{Date demo|2738|11|28}} =	-678576	321424	2721424.5	999999

Input ranges

Invalid input parameters are directly reported: temporarily disabled

{{Date demo|2000|13|01}} =

{{Date demo|2000|00|31}} = -678576

{{Date demo|2000|-1|01}} =

{{Date demo|2000|01|00}} = -678576

{{Date demo|2000|01|32}} =

{{Date demo|2000|1|1.5}} =

{{Date demo|2000.5|1|1}} = -678394

Minimal and maximal date not resulting in exponential notation:

{{Date demo|-2737848929|9|18}} = -21212443

{{Date demo|-2737848929|9|19}} = -21212443

{{Date demo|2737908865|11|11}} = -678576

{{Date demo|2737908865|11|12}} = -678576

Smooth proleptic Gregorian to Julian calendar date transition:

{{Date demo|-4712|01|01}} = -678612, proleptic Julian calendar.

{{MJD|-4712|01|01|12}} = -2399998.5, Julian Day 0 at noon.

{{Date demo|-4712|01|02}} = -678612, JD = +0.5 (4713 BC).

{{Date demo|0100|02|28}} = -678576, last day February 100 (Gregorian)

{{Date demo|0100|02|29}} = -678576, last day February 100 (Julian)

{{Date demo|0100|02|30}} = -678576, {{MJD2D|-642358}} = 28

{{Date demo|0100|03|01}} = -678575

{{Date demo|0100|03|02}} = -678575, {{MJD2D|-642357}} = 1

{{Date demo|0200|02|27}} = -678575, {{MJD2D|-605836}} = 26

{{Date demo|0200|02|28}} = -678575, last day February 200 (Gregorian)

{{Date demo|0200|02|29}} = -678575, last day February 200 (Julian)

{{Date demo|0200|03|01}} = -678574, {{MJD2D|-605833}} = 1

{{Date demo|0300|02|28}} = -678576, last day February 300

{{Date demo|0300|02|29}} = -678576, 300 was no Gregorian leap year

{{Date demo|0300|03|01}} = -678576, {{MJD2D|-569309}} = 1

-678576