Ruling · Nāga Caturthī · 1900

Saturday 27 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 427 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 Saturday 27 October

Taken. The only midday Caturthī reaches.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

48 of 48 minutes covered

Midday of Sunday 28 October

Caturthī is absent from madhyāhna. Not taken.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

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 03:24 on Sat 27 Oct to 04:36 on Sun 28 Oct.

    1900-10-26T19:18:43Z → 1900-10-27T20:31:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 27th, 11:43–12:31 on the 28th.

    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 27th and 0 of 48 on the 28th.

    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 25597 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1900: Saturday 27 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1900 falls on Saturday 27 October. Caturthī runs from 03:24 on Sat 27 Oct to 04:36 on Sun 28 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1900/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 27 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 27 Oct
compat-drikpanchangComparison profileSat 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 Angeles11:19 → 12:3111:1342 min11:1348 min27 Oct
Chicago13:19 → 14:3111:100 min11:1048 min27 Oct
Jersey City14:19 → 15:3111:160 min11:1648 min27 Oct
Port of Spain15:19 → 16:3111:260 min11:2648 min27 Oct
London19:19 → 20:3111:200 min11:2048 min27 Oct
Durban20:49 → 22:0110:460 min10:4648 min27 Oct
Dubai23:00 → 00:1211:200 min11:2048 min27 Oct
Delhi00:40 → 01:5211:320 min11:3248 min27 Oct
Kolkata00:40 → 01:5210:480 min10:4748 min27 Oct
Singapore02:14 → 03:2611:200 min11:2048 min27 Oct
Sydney05:19 → 06:3111:160 min11:1548 min27 Oct
Suva07:14 → 08:2611:220 min11:2148 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

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