երեքշաբթի (Armenian) comes from Old Armenian երեքշաբաթի, from Old Armenian շաբաթ, from Classical Syriac ܫܒܬܐ, from Aramaic שַׁבְּתָא, from Hebrew שַׁבָּת, from Akkadian šapattum — 15.
երեքշաբթի (Armenian): Tuesday