Ruling · Nāga Caturthī · 2020

Wednesday 18 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 471 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 Wednesday 18 November

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 of 48 minutes covered

Midday of Thursday 19 November

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

0 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 03:48 on Wed 18 Nov to 01:47 on Thu 19 Nov.

    2020-11-17T19:47:52Z → 2020-11-18T17:46:37Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 18th, 11:39–12:27 on the 19th.

    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 18th and 0 of 48 on the 19th.

    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 28277 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2020: Wednesday 18 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2020 falls on Wednesday 18 November. Caturthī runs from 03:48 on Wed 18 Nov to 01:47 on Thu 19 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2020/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 18 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 18 Nov
compat-drikpanchangComparison profileWed 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles11:48 → 09:4711:1414 min11:140 min17 Nov
Chicago13:48 → 11:4711:110 min11:1235 min18 Nov
Jersey City14:48 → 12:4711:170 min11:1748 min18 Nov
Port of Spain15:48 → 13:4711:270 min11:2748 min18 Nov
London19:48 → 17:4711:210 min11:2148 min18 Nov
Durban21:48 → 19:4711:170 min11:1748 min18 Nov
Dubai23:48 → 21:4711:400 min11:4048 min18 Nov
Delhi01:18 → 23:1711:420 min11:4248 min18 Nov
Kolkata01:18 → 23:1710:570 min10:5848 min18 Nov
Singapore03:48 → 01:4712:260 min12:2648 min18 Nov
Sydney06:48 → 04:4712:160 min12:1748 min18 Nov
Suva07:48 → 05:4711:270 min11:2848 min18 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

About Ahargaṇa