# Year	Month	Day		Result		Comments
18,	11,	11,		6890
1900,	1,	1,		1		//	Excel 1900 Calendar Base Date
1900,	2,	28,		59		//	Day before Excel mythical 1900 leap day
1900,	2,	29,		60		//	Excel mythical 1900 leap day
1900,	3,	1,		61		//	Day after Excel mythical 1900 leap day
1901,	12,	13,		713		//	Day after Excel mythical 1900 leap day
1901,	12,	14,		714		//	PHP 32-bit Earliest Date
1903,	12,	31,		1461
1904,	1,	1,		1462		//	Excel 1904 Calendar Base Date
1904,	1,	2,		1463
1960,	12,	19,		22269
1970,	1,	1,		25569		//	PHP Base Date
1982,	12,	7,		30292
2008,	6,	12,		39611
2038,	1,	19,		50424		//	PHP 32-bit Latest Date
2038,	1,	20,		50425		//	Day after PHP 32-bit Latest Date
2008,	1,	1,		39448
2008,	1,	,		39447
2008,	1,	-1,		39446
2008,	1,	-30,		39417
2008,	1,	-31,		39416
2008,	1,	-365,		39082
2008,	3,	1,		39508
2008,	3,	,		39507
2008,	3,	-1,		39506
2008,	3,	-365,		39142
2008,	,	1,		39417
2008,	-1,	1,		39387
2008,	-11,	1,		39083
2008,	-12,	1,		39052
2008,	-13,	1,		39022
2008,	-13,	30,		39051
2008,	-13,	,		39021
2008,	-13,	-30,		38991
2008,	-13,	-31,		38990
2008,	13,	1,		39814
2007,	15,	,		39507
2008,	26,	1,		40210
2008,	26,	-10,		40199
2008,	-26,	61,		38686
2010,	-15,	-50,		39641
2010,	-15,	50,		39741
2010,	15,	-50,		40552
2010,	15,	50,		40652
2010,	1.5,	1,		40179
2010,	1.5,	0,		40178
2010,	0,	1.5,		40148
2010,	1,	1.5,		40179
2012,	6,	15,		41075
2012,	6,	,		41060
2012,	,	15,		40892
,	6,	15,		167
10,	6,	15,		3819
10,	,	,		3622
,	10,	,		274
,	,	10,		"#NUM!"
-20,	,	,		"#NUM!"
-20,	6,	15,		"#NUM!"
9999,	12,	31,		2958465		//	Excel Maximum Date
10000,	1,	1,		"#NUM!"		//	Exceeded Excel Maximum Date
2008,	8,	10,		39670
2008,	12,	31,		39813
2008,	8,	32,		39692
2008,	13,	31,		39844
2009,	1,	0,		39813
2009,	1,	-1,		39812
2009,	0,	0,		39782
2009,	0,	-1,		39781
2009,	-1,	0,		39752
2009,	-1,	-1,		39751
2010,	0,	-1,		40146
2010,	5,	31,		40329
2010,	1,	'21st',		40199		//	MS Excel will fail with a #VALUE return, but PHPExcel can parse this date
2010,	"March",'21st',		40168		//	MS Excel will fail with a #VALUE return, but PHPExcel can parse this date
2010,	"March",21,		40168		//	MS Excel will fail with a #VALUE return, but PHPExcel can parse this date
"ABC",	1,	21,		"#VALUE!"
2010,	"DEF",	21,		"#VALUE!"
2010,	3,	"GHI",		"#VALUE!"