Ruling · Māghī Pūrṇimā · 2026

Sunday 1 February

Determinatein Chicago, under the Rashtriya Panchang method. Clear of every threshold by 221 minutes.

Decide it for

ChicagoDelhiKolkataSingaporeSydneyJersey City

41°51′ N 87°39′ W · America/Chicago · GeoNames 4887398

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Saturday 31 January

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:40  12:28 madhyāhna ends
10:5211:1611:4012:0412:2812:5213:16

0 of 48 minutes covered

Midday of Sunday 1 February

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:40  12:28 madhyāhna ends
10:5211:1611:4012:0412:2812:5213:16

48 of 48 minutes covered

Pūrṇimā presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 18:23 on Sat 31 Jan to 16:09 on Sun 1 Feb.

    2026-02-01T00:23:05Z → 2026-02-01T22:09:15Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:40–12:28 on the 31st, 11:40–12:28 on the 1st.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 31st and 48 of 48 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 13250 s

  5. 05

    Ruling

    Māghī Pūrṇimā, Chicago, 2026: Sunday 1 February.

    confidence: determinate

Say it like this

In Chicago, Māghī Pūrṇimā 2026 falls on Sunday 1 February. Pūrṇimā runs from 18:23 on Sat 31 Jan to 16:09 on Sun 1 Feb and covers all of madhyāhna that midday.

ahargana.org/chicago/festivals/2026/maghi-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 1 Feb
Ahargaṇa, classicalDisc centre, no refractionSun 1 Feb
compat-drikpanchangComparison profileSun 1 Feb
No institution has a recorded ruling for Chicago.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/maghi-purnima · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 105

“S 15 Maghi purnima (paraviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles16:23 → 14:0911:4348 min11:430 min1 Feb
Chicago18:23 → 16:0911:4048 min11:410 min1 Feb
Jersey City19:23 → 17:0911:4648 min11:460 min1 Feb
Port of Spain20:23 → 18:0911:5648 min11:560 min1 Feb
London00:23 → 22:0911:5048 min11:500 min1 Feb
Durban02:23 → 00:0911:4548 min11:450 min1 Feb
Dubai04:23 → 02:0912:0848 min12:090 min1 Feb
Delhi05:53 → 03:3912:1148 min12:110 min1 Feb
Kolkata05:53 → 03:3911:2648 min11:260 min1 Feb
Singapore08:23 → 06:0912:5448 min12:540 min1 Feb
Sydney11:23 → 09:0912:4448 min12:450 min1 Feb
Suva12:23 → 10:0911:5621 min11:560 min1 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
maghi-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s