Uma unikezwa umbhalo wokubhekisela osukwini lwezinhlamvu ezibomvu, nikeza incazelo yalokho okushoyo.
Context:Usuku lwezinhlamvu ezibomvu (ngezinye izikhathi olubizwa ngokuthi usuku lwezinhlamvu ezibomvu) yiluphi usuku olubalulekile noma ithuba elikhethekile. Izimpande zayo zisezikhathini zasendulo; ngokwesibonelo, izinsuku ezibalulekile zikhonjiswe ngokubomvu ekhalendeni elivela eRiphabhuliki yaseRoma (509<unk>27 BC).  Emibhalweni yesandla yangeNkathi Ephakathi, izinhlamvu ezinkulu zokuqala namagama agqanyisiwe (owaziwa ngokuthi ama - rubric) ayebhalwa ngoyinki obomvu. Lo mkhuba waqhubeka ngisho nangemva kokusungulwa komshini wokunyathelisa, kuhlanganise nasezincwadini zamaKatolika zokukhulekela. Amakhalenda amaningi asabonisa izinsuku ezikhethekile, imikhosi namaholidi ngokubomvu esikhundleni sokumnyama.  Emanyuvesi ase-UK, izinsuku ezibomvu yilapho odokotela bengakwazi ukugqoka izingubo zabo ezibomvu 'zemikhosi' noma zokugqoka okugcwele esikhundleni sokugqoka kwabo ('okumnyama').  ENorway, eSweden, eHong Kong, eNingizimu Korea, e-Indonesia nakwamanye amazwe aseLatin America, iholide lomphakathi kwesinye isikhathi libizwa ngokuthi "usuku olubomvu" (rød dag, röd dag, 빨간 날, 紅日, tanggal merah), njengoba libhalwe ngombala obomvu kumakhalenda
Usuku olunezinhlamvu ezibomvu yiluphi usuku olubalulekile noma ithuba elikhethekile njengamaholide nemikhosi.