Lachisanu pa 13 ndi tsiku lokhudzana ndi tsoka. Patsiku lino, mamiliyoni a anthu okhulupirira malodza amapewa misonkhano ndi amphaka akuda, amakhala kutali ndi magalasi kuopa kuwaswa, amakana kuyendetsa galimoto ndi kuyenda pa ndege. Mahotela ndi zipatala nthawi zambiri amadumpha chipinda cha 13, ndipo ma eyapoti amadumpha kutuluka kwa 13.
Pali mawu akuti kuopa Lachisanu pa 13 - paraskavedecatriaphobia kapena frigatriskaidekaphobia. Kuopa nambala 13 kumatchedwa triskaidekaphobia.
Kuyanjana ndi tsoka kungakhale kwa m'Baibulo - 13 anali alendo pa Mgonero Womaliza pamene Yesu anaperekedwa. Anapachikidwa tsiku lotsatira - Lachisanu. N’kuthekanso kuti 13 sakukomera chifukwa ndi pambuyo pa 12, monganso miyezi. Zizindikiro za zodiac, milungu ya Olympus, zozizwitsa za Hercules, mafuko a Israeli ndi atumwi a Yesu ndi khumi ndi awiri.
M’Nyengo Zapakati, Lachisanu linkatchedwa Tsiku la Kupachika (Hanging Day) chifukwa apandu ankaphedwa panthawiyo. Panali masitepe 13 opita ku njanjiyo, zokolekapo zambirimbiri pamtengowo, ndalama 13 zinaperekedwa kwa wophayo.
Purezidenti Franklin Roosevelt sanayende Lachisanu pa 13, komanso sanachite nawo maphwando a chakudya chamadzulo kwa anthu 13. Ngakhale Napoliyoni wamkulu anavutika ndi mantha owopsa a chiŵerengero cha imfa.
Kuwonongeka koyipa kwambiri Lachisanu 13th pa mbiri kunali mu October 1972 pamene ndege inagwa ku Andes. Anthu 12 amwalira ndipo opulumukawo adakakamizidwa kudya mitembo asanapulumutsidwe patatha masiku 72.
Kutha kwa dziko kumayembekezeredwanso patsikuli. Malinga ndi zolosera, Lachisanu pa 13 mu 2029, 320 m diameter asteroid 99942 Apophis idzadutsa mowopsa pafupi ndi Dziko Lapansi. Malinga ndi asayansi a NASA, ngati asteroid ingagwe, ingawononge dera lalikulu la Texas. Ngati itagwera m’nyanja, imatha kuyambitsa mafunde aakulu.
