Ruling · Nāga Caturthī · 1925

Wednesday 21 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 528 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 Tuesday 20 October

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

Midday of Wednesday 21 October

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

Caturthī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 22:52 on Tue 20 Oct to 21:14 on Wed 21 Oct.

    1925-10-20T14:52:29Z → 1925-10-21T13:14:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 20th, 11:39–12:27 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 31668 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1925: Wednesday 21 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1925 falls on Wednesday 21 October. Caturthī runs from 22:52 on Tue 20 Oct to 21:14 on Wed 21 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1925/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 21 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 21 Oct
compat-drikpanchangComparison profileWed 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles06:52 → 05:1411:1448 min11:130 min20 Oct
Chicago08:52 → 07:1411:1148 min11:110 min20 Oct
Jersey City09:52 → 08:1411:1748 min11:170 min20 Oct
Port of Spain10:52 → 09:1411:2748 min11:270 min20 Oct
London14:52 → 13:1411:210 min11:2148 min21 Oct
Durban16:52 → 15:1411:170 min11:1748 min21 Oct
Dubai18:52 → 17:1411:400 min11:3948 min21 Oct
Delhi20:22 → 18:4411:420 min11:4248 min21 Oct
Kolkata20:22 → 18:4410:570 min10:5748 min21 Oct
Singapore21:52 → 20:1411:260 min11:2548 min21 Oct
Sydney00:52 → 23:1411:160 min11:1648 min21 Oct
Suva02:52 → 01:1411:270 min11:2748 min21 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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