HesapHanem

Quarter from Date Calculator

Enter a date and your fiscal-year start month to find its quarter.

How it is calculated

Enter a date as YYYY-MM-DD (year and month alone also work) and the month your fiscal year starts, from 1 to 12; blank means January. The calendar quarter is Q = ⌈month ÷ 3⌉. For the fiscal quarter the tool counts how many months the date is past the fiscal start, offset = (month − start) mod 12, and sets fiscal Q = ⌊offset ÷ 3⌋ + 1. Impossible dates such as 30 February are rejected, as is a start month outside 1 to 12; a decimal start month is cut to its whole part. The date range shown (for example Jan 1 – Mar 31) is that of the calendar quarter, not the fiscal quarter's range, and its month names follow the page language. Both quarters are labelled Q1 to Q4.

Worked example

Take 15 February 2026 for an organisation whose fiscal year starts in July (start month 7). February is month 2, so the calendar quarter is ⌈2 ÷ 3⌉ = 1, shown as Q1, with the range Jan 1 – Mar 31. For the fiscal quarter, the offset is (2 − 7) mod 12 = 7 months after the July start. Then ⌊7 ÷ 3⌋ + 1 = 3, so the fiscal quarter is Q3. This matches counting on the fiscal calendar: Jul–Sep is Q1, Oct–Dec is Q2 and Jan–Mar is Q3.

Try this example →

Common mistakes

  • Entering the date as DD/MM/YYYY or MM/DD/YYYY. Only YYYY-MM-DD (or YYYY-MM) is understood; the slash formats return nothing.
  • Leaving the fiscal start month blank for a company with a non-calendar year. Blank means January, so the fiscal and calendar quarters come out the same.
  • Entering the month the fiscal year ends in rather than the month it starts. A year ending in June starts in July, so enter 7, not 6.
  • Expecting a fiscal year label. The tool returns only the quarter number, and different organisations name their fiscal year differently (by the year it starts or the year it ends).
  • Reading the printed date range as the fiscal quarter. It always shows the calendar quarter (for 15 Feb 2026 with a July start: Jan 1 – Mar 31, even though the fiscal quarter is Q3 there).

About this calculator

The calendar quarter for any date is determined purely by its month (January–March = Q1, April–June = Q2, and so on), but the fiscal quarter depends on when an organization's fiscal year begins — a company with an October 1 fiscal-year start (like the U.S. federal government) has its Q1 running October through December, offsetting every quarter by three months relative to the calendar year.

This calculator takes a date plus your fiscal-year start month and returns both figures at once. Accountants, financial analysts, and business owners use it when reconciling reporting periods across organizations with different fiscal-year conventions, or when preparing quarterly filings and board reports that must reference the correct fiscal — not calendar — quarter.

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Comments (1)

  • Editorial team

    The tool gives the quarter number only, not the fiscal year it belongs to, and organisations name fiscal years differently, some by the year they start and some by the year they end. Check your own reporting policy before labelling a report. A start month of 4 matches an April to March year. Which start month does your organisation use, and how does it name the fiscal year?

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