Ruling · Nāga Pañcamī (Mārgaśīrṣa) · 1921

Sunday 4 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 533 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

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

Midday of Sunday 4 December

Taken. The only midday Pañcamī reaches.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

48 of 48 minutes covered

Midday of Monday 5 December

Pañcamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:45  12:33 madhyāhna ends
10:5711:2111:4512:0912:3312:5713:21

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pañcamī runs from 00:43 on Sun 4 Dec to 02:52 on Mon 5 Dec.

    1921-12-03T16:42:41Z → 1921-12-04T18:51:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 4th, 11:45–12:33 on the 5th.

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

  3. 03

    Rule

    Pañcamī must be present during madhyāhna. It covers 48 of 48 minutes on the 4th and 0 of 48 on the 5th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

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

    priority: paraviddha → only-day · margin 31952 s

  5. 05

    Ruling

    Nāga Pañcamī (Mārgaśīrṣa), Baoding, 1921: Sunday 4 December.

    confidence: determinate

Say it like this

In Baoding, Nāga Pañcamī (Mārgaśīrṣa) 1921 falls on Sunday 4 December. Pañcamī runs from 00:43 on Sun 4 Dec to 02:52 on Mon 5 Dec and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1921/naga-panchami-margashirsha · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 4 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 4 Dec
compat-drikpanchangComparison profileSun 4 Dec
No institution has a recorded ruling for Baoding.

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

The rule, as data

/rules/naga-panchami-margashirsha · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Pañcamī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 5 Naga pancami (2nd) (paraviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePañcamīMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles08:43 → 10:5211:1948 min11:190 min3 Dec
Chicago10:43 → 12:5211:1648 min11:1748 min4 Dec
Jersey City11:43 → 13:5211:2227 min11:2248 min4 Dec
Port of Spain12:43 → 14:5211:320 min11:3248 min4 Dec
London16:43 → 18:5211:260 min11:2748 min4 Dec
Durban18:43 → 20:5211:220 min11:2248 min4 Dec
Dubai20:43 → 22:5211:440 min11:4548 min4 Dec
Delhi22:13 → 00:2211:470 min11:4748 min4 Dec
Kolkata22:13 → 00:2211:020 min11:0348 min4 Dec
Singapore23:43 → 01:5211:300 min11:3148 min4 Dec
Sydney02:43 → 04:5211:210 min11:2148 min4 Dec
Suva04:43 → 06:5211:320 min11:3248 min4 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
naga-panchami-margashirsha@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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