Mai Canza Unix Timestamp zuwa Rana

Menene Unix timestamp?

Unix timestamp wata hanya ce ta bin diddigin lokaci a matsayin jimillar sekondi. Wannan adadi yana farawa daga Unix Epoch a ranar 1 ga Janairu, 1970 a UTC. Saboda haka, Unix timestamp kawai yana nufin adadin sekondi tsakanin wata rana da Unix Epoch. Hakanan ya kamata a nuna (godiyar ga sharhin daga masu ziyara wannan shafin) cewa wannan lokaci ba ya canzawa kodayake inda kake a duniya. Wannan yana da amfani sosai ga tsarin kwamfuta don bin diddigin da tsara bayanan da aka saka a lokaci a cikin aikace-aikacen da suke canzawa da rarraba, ko a kan layi ko a gefen mai amfani.

Me zai faru a ranar 19 ga Janairu, 2038?

Matsalar Shekara ta 2038 (wanda aka fi sani da Y2038, Epochalypse, Y2k38, ko Unix Y2K) yana da alaka da wakiltar lokaci a cikin yawa na sekondi da aka wuce tun daga 00:00:00 UTC a ranar 1 ga Janairu, 1970 kuma ana adana shi a matsayin lamba mai sa hannu 32-bit. Irin waɗannan aiwatarwar ba za su iya wakiltar lokuta bayan 03:14:07 UTC a ranar 19 ga Janairu, 2038 ba. Kamar yadda matsalar Y2K ta faru, matsalar Shekara ta 2038 tana faruwa ne saboda ƙarancin ƙarfin ƙwaƙwalwa don wakiltar lokaci.

Mafi ƙarancin lokaci tun daga 1 ga Janairu, 1970 wanda za a iya adanawa ta amfani da lamba mai sa hannu 32-bit shine 03:14:07 a ranar Talata, 19 ga Janairu, 2038 (231-1 = 2,147,483,647 sekondi bayan 1 ga Janairu, 1970). Shirye-shiryen da za su ƙoƙari ƙara lokaci bayan wannan ranar za su sa ƙimar ta adana a matsayin lamba mai negatifa, wanda tsarin zai fassara a matsayin 20:45:52 a ranar Juma'a, 13 ga Disamba, 1901 (2,147,483,648 sekondi kafin 1 ga Janairu, 1970) maimakon 19 ga Janairu, 2038. Wannan yana faruwa ne saboda cika iyaka na adadin lambobi, inda ma'aunin zai ƙare daga amfani da bits masu amfani, yana canza alamar ma'aunin maimakon haka. Wannan yana haifar da rahoton mafi ƙarancin lamba, sannan yana ci gaba da ƙidaya, zuwa sifili, sannan yana ƙidaya cikin lambobin ƙididdiga masu kyau.