calendar quarter
noun[C]
ukusFINANCE
one of the fourperiodsof threemonthsinto which thefinancialyearisdivided(JanuaryuntilMarch,ApriluntilJune,JulyuntilSeptember, andOctoberuntilDecember):
Theformmust befiledwithin 30daysof the end of eachcalendarquarter.