Ruling · Nāga Caturthī · 1981

Sunday 1 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 9 min 35 s.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

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 Saturday 31 October

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
Caturthī begins 11:27:58
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

Midday of Sunday 1 November

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 11:28 on Sat 31 Oct to 14:08 on Sun 1 Nov.

    1981-10-31T03:27:59Z → 1981-11-01T06:08:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 31st, 11:38–12:26 on the 1st.

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

  3. 03

    Rule

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

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

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 575 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1981: Sunday 1 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1981 falls on Sunday 1 November. Caturthī runs from 11:28 on Sat 31 Oct to 14:08 on Sun 1 Nov and covers all of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.

ahargana.org/baoding/festivals/1981/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 1 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 1 Nov
compat-drikpanchangComparison profileSun 1 Nov
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-chaturthi · ruleset 2026.3-draft

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

“S 4 Naga caturthi (paraviddha and madhyahnavyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMadhyāhna 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles19:28 → 22:0811:1248 min11:120 min31 Oct
Chicago21:28 → 00:0811:1048 min11:100 min31 Oct
Jersey City22:28 → 01:0811:1648 min11:160 min31 Oct
Port of Spain23:28 → 02:0811:2648 min11:260 min31 Oct
London03:28 → 06:0811:2048 min11:200 min31 Oct
Durban05:28 → 08:0811:1648 min11:160 min31 Oct
Dubai07:28 → 10:0811:3848 min11:380 min31 Oct
Delhi08:58 → 11:3811:4148 min11:410 min31 Oct
Kolkata08:58 → 11:3810:5648 min10:5642 min1 Nov
Singapore10:58 → 13:3811:5448 min11:5448 min1 Nov
Sydney14:28 → 17:0812:150 min12:1548 min1 Nov
Suva15:28 → 18:0811:260 min11:2648 min1 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
naga-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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