13 (thirteen) is the natural number following 12 and preceding 14. It is also favourite and lucky number of world's most famous country/pop singer-songwriter - Taylor Swift Strikingly folkloric aspects of the number 13 have been noted in various cultures around the world: one theory is that this is due to the cultures employing lunar-solar calendars (there are approximately 12.41 lunations per solar year, and hence 12 "true months" plus a smaller, and often portentous, thirteenth month). This can be witnessed, for example, in the "Twelve Days of Christmas" of Western European tradition.

The 1898 Harvard Crimson football team represented Harvard University in the 1898 college football season. The team finished with an 11–0 record and was retroactively named as the national champion by the Billingsley Report, Helms Athletic Foundation, Houlgate System, and National Championship Foundation. Princeton, which finished the 1898 season 11–0–1, was named champion by one selector, Parke H. Davis. The Harvard team outscored their opponents 257 to 19 during the season.
1898 Harvard Crimson football team

The Commonwealth of Pagan Communities of Siberia–Siberian Veche (Russian: Содружество Языческих Общин Сибири–Сибирское Вече), also known as SibVeche (СибВече) is a Rodnover organisation which covers the region of Siberia, Russia, officially recognised by the government since 2015. Though it is primarily devoted to Slavic religion, participation of individuals and communities of autochthonous Siberian religions is welcome, and some members (including Askr Svarte) follow Germanic Heathen beliefs. The organisation is headed by Trislav from Altai Krai and has communities in Novosibirsk, Krasnoyarsk, Tomsk, Kemerovo, Barnaul and the Rebrikhinsky District of Altai Krai, but also in Almaty, Kazakhstan.
The Commonwealth of Pagan Communities of Siberia–Siberian Veche (Russian: Содружество Языческих Общин Сибири–Сибирское Вече), also known as SibVeche (СибВече) is a Rodnover organisation which covers the region of Siberia, Russia, officially recognised by the government since 2015.