Ruling · Nāga Caturthī · 2021

Monday 8 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 202 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 7 November

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 Monday 8 November

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 18:52 on Sun 7 Nov to 15:47 on Mon 8 Nov.

    2021-11-07T10:52:26Z → 2021-11-08T07:47:11Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 7th, 11:38–12:26 on the 8th.

    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 7th and 48 of 48 on the 8th.

    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 12091 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 2021: Monday 8 November.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 2021 falls on Monday 8 November. Caturthī runs from 18:52 on Sun 7 Nov to 15:47 on Mon 8 Nov and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2021/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 8 Nov
Ahargaṇa, classicalDisc centre, no refractionMon 8 Nov
compat-drikpanchangComparison profileMon 8 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 7thCoveredMadhyāhna 8thCoveredRuled
Los Angeles02:52 → 23:4711:1248 min11:130 min7 Nov
Chicago04:52 → 01:4711:1048 min11:100 min7 Nov
Jersey City05:52 → 02:4711:1648 min11:160 min7 Nov
Port of Spain06:52 → 03:4711:2648 min11:260 min7 Nov
London10:52 → 07:4711:2048 min11:200 min7 Nov
Durban12:52 → 09:4711:160 min11:160 min8 Nov
Dubai14:52 → 11:4711:380 min11:389 min8 Nov
Delhi16:22 → 13:1711:410 min11:4148 min8 Nov
Kolkata16:22 → 13:1710:560 min10:5648 min8 Nov
Singapore18:52 → 15:4712:240 min12:2448 min8 Nov
Sydney21:52 → 18:4712:150 min12:1548 min8 Nov
Suva22:52 → 19:4711:260 min11:2648 min8 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