Ruling · Nāga Caturthī · 2011

Sunday 30 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 172 minutes.

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 29 October

Caturthī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Sunday 30 October

Taken. The only midday Caturthī reaches.

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 17:43 on Sat 29 Oct to 15:17 on Sun 30 Oct.

    2011-10-29T09:42:50Z → 2011-10-30T07:17:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 29th, 11:38–12:26 on the 30th.

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

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 29th and 48 of 48 on the 30th.

    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 10295 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2011: Sunday 30 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2011 falls on Sunday 30 October. Caturthī runs from 17:43 on Sat 29 Oct to 15:17 on Sun 30 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2011/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 30 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 30 Oct
compat-drikpanchangComparison profileSun 30 Oct
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 29thCoveredMadhyāhna 30thCoveredRuled
Los Angeles02:43 → 00:1712:1248 min12:120 min29 Oct
Chicago04:43 → 02:1712:1048 min12:100 min29 Oct
Jersey City05:43 → 03:1712:1648 min12:160 min29 Oct
Port of Spain05:43 → 03:1711:2648 min11:260 min29 Oct
London10:43 → 07:1712:2048 min11:200 min29 Oct
Durban11:43 → 09:1711:1621 min11:160 min29 Oct
Dubai13:43 → 11:1711:380 min11:380 min30 Oct
Delhi15:13 → 12:4711:410 min11:4148 min30 Oct
Kolkata15:13 → 12:4710:560 min10:5648 min30 Oct
Singapore17:43 → 15:1712:240 min12:2448 min30 Oct
Sydney20:43 → 18:1712:150 min12:1548 min30 Oct
Suva22:43 → 20:1712:260 min12:2648 min30 Oct
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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