հինգշաբթի (Armenian) comes from Old Armenian հինգշաբաթի, from Old Armenian շաբաթ, from Classical Syriac ܫܒܬܐ, from Aramaic שַׁבְּתָא, from Hebrew שַׁבָּת, from Akkadian šapattum — 15.
հինգշաբթի (Armenian): Thursday