Fiscal Calendar Intelligence

The quarters you're trading on are wrong.

TrueQuarter projects forward fiscal quarter-end dates for every US public company — including the 25% whose fiscal years don't end on December 31 that conventional platforms approximate to month-end.

Exhibit A — Quarter ending Q1 2026
Ticker Calendar Type Month-End Approx. Actual (SEC Filing) Error
AAPL 52/53-wk, Sat closest to Sep 30 Dec 31, 2025 Dec 27, 2025 4 days
COST 52/53-wk, Sun closest to Aug 31 Nov 30, 2025 Nov 23, 2025 7 days
NKE 52/53-wk, Sat closest to May 31 Aug 31, 2025 Aug 30, 2025 1 day
CPB 52/53-wk, Sun closest to Jul 31 Jan 31, 2026 Jan 26, 2026 5 days
GIS 52/53-wk, Sun closest to May 31 Nov 30, 2025 Nov 23, 2025 7 days
The Problem

Nobody projects these dates forward.

No terminal, no platform, no vendor projects forward quarter-end dates for 52/53-week companies. The standard approach is to snap to month-end — an approximation that's off by 1–7 days for hundreds of companies. Manual spreadsheets break on 53rd-week transitions and miss fiscal year changes buried in 8-K filings. The result: your alt data pipeline is aligning signals to the wrong fiscal quarters, and nobody notices until earnings.

25%
of US-GAAP companies don't end their fiscal year on Dec 31 — 448 tickers with non-standard quarter boundaries
1–7 days
typical quarter-end date error when Bloomberg/FactSet snap 52/53-week companies to month-end
5–6 yrs
between 53rd-week years — silently shifting all quarter-end dates by a full week
Coverage

Four calendar types. 1,789 tickers.

We classify every US-GAAP public company into one of four fiscal calendar structures and project quarter-end dates through 2031.

Gregorian (Dec 31 FY)
1,341 75%
Gregorian (non-Dec 31 FY)
282 16%
52/53-week (13|13|13|14)
158 9%
52/53-week (12|12|12|16)
8 <1%
Source: TrueQuarter analysis of 1,789 US-GAAP tickers from SEC EDGAR XBRL filings

Gregorian

Fixed calendar month-end dates. The simple case—quarters always end on the same day.

MSFT → Jun 30, Sep 30, Dec 31, Mar 31

Modified Gregorian

Quarters adjusted to nearest weekday. Fiscal year always ends December 31.

CNR → Sat-adjusted quarter-ends

52/53-Week (13wk)

Four 13-week quarters ending on the same weekday. One quarter absorbs the 53rd week every 5–6 years.

AAPL → Sat closest to Sep 30, extra week Q1

52/53-Week (12-12-12-16)

Three 12-week quarters plus one 16-week quarter. NRF/retail calendar. Extra week added to the long quarter.

TACO → Tue closest to Dec 31, long Q4
Pipeline

SEC filings in. Projected dates out.

Fully automated. No manual tagging. Calendar changes detected from 8-K filings within hours.

SEC EDGAR
→
XBRL Extraction
→
LLM Classification
→
Forward Projection
→
Your Pipeline
Refresh: Daily Coverage: 1,789 tickers Horizon: Through 2031 History: 1994–present
Change Detection

Companies change their calendars. We catch it.

Board-approved fiscal year changes are disclosed in 8-K filings under Item 5.03. Our pipeline scans every daily SEC filing for calendar changes and updates projections automatically. Manual systems miss these for months.

AVY
Avery Dennison
Changed from Saturday 52/53-week to gregorian starting FY2025. All forward quarter-end dates shifted.
52/53-wk → Gregorian
DIN
Dine Brands (Applebee's, IHOP)
Changed from gregorian (Dec 31 FY) to week-based starting FY2025. Quarter-ends no longer fall on month-end.
Gregorian → Week-based
NYT
The New York Times Company
Board approved change from 52/53-week (last Sunday of December) to calendar year, effective FY2022. Prior periods not adjusted.
52/53-wk → Gregorian

30 calendar changes detected across our coverage universe. Each one silently invalidates every forward date in a manual spreadsheet.

Pricing

Priced as infrastructure, not alpha.

Standard
$15,000
per year
  • Full ticker universe
  • Forward projections + 3yr history
  • Daily Parquet delivery via S3
  • AWS Marketplace terms
AWS Data Exchange · Self-serve
Enterprise
$36,000
per year
  • Full ticker universe
  • Forward projections + 5yr history
  • DDQ, SLA, custom EULA
  • Email support + custom tickers
AWS Data Exchange · Private offer
Quant Package
Contact us
one-time backfill + annual
  • Full 1994–present CIK-mapped archive
  • Point-in-time, survivorship-bias-free
  • Backtesting-grade historical data
  • White-glove onboarding
Direct · Custom terms

Stop guessing quarter-end dates.

Available now on AWS Data Exchange. Request a sample for any 50 tickers.

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