;Friday the 13th
;13th of a month is ominous, particularly when it falls on a Friday in some English-speaking cultures, Russia & Germany
;Triskaidekaphobia (from Greek tris=three, kai=and, deka=ten) is a fear of the number 13. It is a superstition.
;A specific fear of Friday the 13th is called paraskavedekatriaphobia or friggatriskaidekaphobia.

LANGUAGE=UTF8
IMAGE=Holiday_Attention.gif
COMMENT=Updated June 12, 2012 \nOminous in the English-speaking cultures, Russia & Germany \nvalid from March 1, 1900 to February 28, 2100

13.1.%1900,28>1900<2100  =Friday the 13th (January #0000, 1st of 3 in #0000)
13.4.%1900,28>1899<2100  =Friday the 13th (April #0000, 2nd of 3 in #0000)
13.7.%1900,28>1899<2100  =Friday the 13th (July #0000, 3th & last in #0000)

13.9.%1901,28>1899<2100  =Friday the 13th (September #0000, 1st of 2 in #0000)
13.12.%1901,28>1899<2100 =Friday the 13th (December #0000, 2nd & last in #0000)

13.6.%1902,28>1899<2100  =Friday the 13th (June #0000, only one in #0000)

13.2.%1903,28>1899<2100  =Friday the 13th (February #0000, 1st of 3 in #0000)
13.3.%1903,28>1899<2100  =Friday the 13th (March #0000, 2nd of 3 in #0000)
13.11.%1903,28>1899<2100 =Friday the 13th (November #0000, 3th & last in #0000)

13.5.%1904,28>1899<2100  =Friday the 13th (May #0000, only one in #0000)

13.1.%1905,28>1899<2100  =Friday the 13th (January #0000, 1st of 2 in #0000)
13.10.%1905,28>1899<2100 =Friday the 13th (October #0000, 2nd & last in #0000)

13.4.%1906,28>1899<2100  =Friday the 13th (April #0000, 1st of 2 in #0000)
13.7.%1906,28>1899<2100  =Friday the 13th (July #0000, 2nd & last in #0000)

13.9.%1907,28>1899<2100  =Friday the 13th (September #0000, 1st of 2 in #0000)
13.12.%1907,28>1899<2100 =Friday the 13th (December #0000, 2nd & last in #0000)

13.3.%1908,28>1899<2100  =Friday the 13th (March #0000, only one in #0000)

13.8.%1909,28>1899<2100  =Friday the 13th (August #0000, only one in #0000)

13.5.%1910,28>1899<2100  =Friday the 13th (May #0000, only one in #0000)

13.1.%1911,28>1899<2100  =Friday the 13th (January #0000, 1st of 2 in #0000)
13.10.%1911,28>1899<2100 =Friday the 13th (October #0000, 2nd & last in #0000)

13.9.%1912,28>1899<2100  =Friday the 13th (September #0000, 1st of 2 in #0000)
13.12.%1912,28>1899<2100 =Friday the 13th (December #0000, 2nd & last in #0000)

13.6.%1913,28>1899<2100  =Friday the 13th (June #0000, only one in #0000)

13.2.%1914,28>1899<2100  =Friday the 13th (February #0000, 1st of 3 in #0000)
13.3.%1914,28>1899<2100  =Friday the 13th (March #0000, 2nd of 3 in #0000)
13.11.%1914,28>1899<2100 =Friday the 13th (November #0000, 3th & last in #0000)

13.8.%1915,28>1899<2100  =Friday the 13th (August #0000, only one in #0000)

13.10.%1916,28>1899<2100 =Friday the 13th (October #0000, only one in #0000)

13.4.%1917,28>1899<2100  =Friday the 13th (April #0000, 1st of 2 in #0000)
13.7.%1917,28>1899<2100  =Friday the 13th (July #0000, 2nd & last in #0000)

13.9.%1918,28>1899<2100  =Friday the 13th (September #0000, 1st of 2 in #0000)
13.12.%1918,28>1899<2100 =Friday the 13th (December #0000, 2nd & last in #0000)

13.6.%1919,28>1899<2100  =Friday the 13th (June #0000, only one in #0000)

13.2.%1920,28>1899<2100  =Friday the 13th (February #0000, 1st of 2 in #0000)
13.8.%1920,28>1899<2100  =Friday the 13th (August #0000, 2nd & last in #0000)

13.5.%1921,28>1899<2100  =Friday the 13th (May #0000, only one in #0000)

13.1.%1922,28>1899<2100  =Friday the 13th (January #0000, 1st of 2 in #0000)
13.10.%1922,28>1899<2100 =Friday the 13th (October #0000, 2nd & last in #0000)

13.4.%1923,28>1899<2100  =Friday the 13th (April #0000, 1st of 2 in #0000)
13.7.%1923,28>1899<2100  =Friday the 13th (July #0000, 2nd & last in #0000)

13.6.%1924,28>1899<2100  =Friday the 13th (June #0000, only one in #0000)

13.2.%1925,28>1899<2100  =Friday the 13th (February #0000, 1st of 3 in #0000)
13.3.%1925,28>1899<2100  =Friday the 13th (March #0000, 2nd of 3 in #0000)
13.11.%1925,28>1899<2100 =Friday the 13th (November #0000, 3th & last in #0000)

13.8.%1926,28>1899<2100  =Friday the 13th (August #0000, only one in #0000)

13.5.%1927,28>1899<2100  =Friday the 13th (May #0000, only one in #0000)


;These entries were added by: dewaelheyns(a)gmail.com - http://users.telenet.be/wdew/
;The abbreviations {d} {m} {e} {y} ... are explained on http://users.telenet.be/wdew/Basis%20PTB/BasisEN.htm