how long is a fiscal quarter
Quarters. The calendar year can be divided into four quarters, often abbreviated as Q1, Q2, Q3, and Q4. First quarter, Q1: 1 January â 31 March (90 days or 91 days in leap years) Second quarter, Q2: 1 April â 30 June (91 days) Third quarter, Q3: 1 July â 30 September (92 days) Fourth quarter, Q4: 1 October â 31 December (92 days) When combined with a year, the quarter/year combination may be written, for example, as Q42018 or 4Q2018 or 2018Q4. See also. Academic term; Calendar reform; Common year; Fiscal year; ISO 8601