Ma'anar ƙamus na "shekarar kalanda" tana nufin lokacin da zai fara daga 1 ga Janairu kuma ya ƙare a ranar 31 ga Disamba, yawanci ana amfani da shi azaman daidaitaccen lokaci da lokacin lissafin shekara ɗaya. Ana amfani da shi a wurare daban-daban, kamar kasuwanci, kuɗi, haraji, da al'amuran shari'a. Shekarar kalanda ta ƙunshi watanni 12 kuma ana karɓar ko'ina a matsayin daidaitaccen shekara a yawancin ƙasashe na duniya don dalilai na hukuma da gudanarwa.