Quarters of the year

how many quarters in year

How many quarters in year, how many quarters in the year, how many quarter in a year, and how many quarters are in a year are the same count: four. A quarter is one-fourth of a twelve-month year, which is three months when you split by calendar months. The labels are Q1, Q2, Q3, and Q4. They are a filing system. They do not add a fifth season and they do not remove a month.

On the Gregorian calendar, Q1 is 1 January through 31 March. That block is 90 days, or 91 in a leap year because February gains a day. Q2 is 1 April through 30 June (91 days). Q3 is 1 July through 30 September (92 days). Q4 is 1 October through 31 December (92 days). The four lengths are not identical. Four is still the number of quarters.

People mix the question with seasons because both come in fours. That is a rhyme, not an identity. Meteorological seasons are also four three-month blocks, but they start on 1 March, 1 June, 1 September, and 1 December. Calendar Q1 is mostly winter plus the first month of meteorological spring. Do not rename Q1 “spring” and then wonder why January snow is in it.

Four quarters, four meteorological seasons

Northern meteorological spring is March, April, May. Summer is June, July, August. Autumn is September, October, November. Winter is December, January, February. Each is three months, so each is a quarter of the year in length. The offset from calendar quarters is two months. Calendar Q2 (April–June) swallows the last two-thirds of spring and the first month of summer. That overlap is why a “spring quarter” in ordinary speech is unsafe unless you say whose spring.

Astronomical seasons are four as well, but they are bounded by equinoxes and solstices, so their lengths wobble slightly and their starts are not month boundaries. A company that reports “seasonal” sales still usually means calendar or fiscal quarters, not the equinox. If you need weather, use the meteorological three-month blocks. If you need books, use Q1 through Q4 as the organization defined them.

How many quarters in a year: four. Calendar Q1–Q4: Jan–Mar, Apr–Jun, Jul–Sep, Oct–Dec. Meteorological seasons: four three-month blocks offset to Mar, Jun, Sep, Dec. Astronomical seasons: four, bounded by equinox and solstice, not by month names.

A year can also be split into two halves, three four-month stretches, or twelve months. Those splits do not change the answer to how many quarters are in a year. They are other rulers. If a form asks for the quarter, it wants Q1, Q2, Q3, or Q4 of the year it named, not a season nickname. Four quarters stay four even when one of them feels like two winters glued together.

Fiscal quarters are still four

A fiscal year is a twelve-month accounting year that may start in a month other than January. It still has four quarters. The U.S. federal government’s fiscal year begins 1 October and ends 30 September, so its Q1 is October–December. A firm that starts 1 July has a Q1 in July–September. The word “Q1” always means the first three months of that year, not “January” by magic. When two people say Q3 they must share the year-start or they are talking about different months.

Retail calendars sometimes use four quarters of thirteen weeks instead of three calendar months, so that each quarter has the same number of weeks. That is still four quarters. A 53-week retail year can lengthen one quarter; it does not create a fifth. If you are filling a tax or earnings form, read which year-start that form uses. The count of quarters will be four either way. The months inside Q2 will not.