Ruling · Nāga Caturthī · 2071

Tuesday 27 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 17 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 Monday 26 October

Qualifies with 31 of 48 minutes. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
Caturthī begins 11:55:20
10:5011:1411:3812:0212:2612:5013:14

31 of 48 minutes covered, the last 31

Midday of Tuesday 27 October

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

madhyāhna begins 11:38  12:26 madhyāhna ends
Caturthī ends 12:50:20
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 11:55 on Mon 26 Oct to 12:50 on Tue 27 Oct.

    2071-10-26T03:55:20Z → 2071-10-27T04:50:20Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 26th, 11:38–12:26 on the 27th.

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

  3. 03

    Rule

    Caturthī must be present during madhyāhna. It covers 31 of 48 minutes on the 26th and 48 of 48 on the 27th.

    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 1039 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2071: Tuesday 27 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2071 falls on Tuesday 27 October. Caturthī runs from 11:55 on Mon 26 Oct to 12:50 on Tue 27 Oct and covers all of madhyāhna that midday. It also reaches the previous midday for 31 minutes; by the rule the second midday is taken.

ahargana.org/baoding/festivals/2071/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 27 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 27 Oct
compat-drikpanchangComparison profileTue 27 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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles20:55 → 21:5012:1348 min12:130 min26 Oct
Chicago22:55 → 23:5012:1048 min12:100 min26 Oct
Jersey City23:55 → 00:5012:1648 min12:160 min26 Oct
Port of Spain23:55 → 00:5011:2648 min11:260 min26 Oct
London03:55 → 04:5011:2048 min11:200 min26 Oct
Durban05:55 → 06:5011:1648 min11:160 min26 Oct
Dubai07:55 → 08:5011:3948 min11:390 min26 Oct
Delhi09:25 → 10:2011:4148 min11:410 min26 Oct
Kolkata09:25 → 10:2010:5748 min10:560 min26 Oct
Singapore11:55 → 12:5012:2548 min12:2526 min27 Oct
Sydney14:55 → 15:5012:160 min12:1548 min27 Oct
Suva15:55 → 16:5011:270 min11:2648 min27 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

About Ahargaṇa