Ruling · Nāga Caturthī · 1960

Monday 24 October

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 14 s away. Say “contested”.

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 Sunday 23 October

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 24 October

Taken. Caturthī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:38  12:26 madhyāhna ends
Caturthī ends 11:37:54
10:5011:1411:3812:0212:2612:5013:14

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 14:03 on Sun 23 Oct to 11:38 on Mon 24 Oct.

    1960-10-23T06:03:25Z → 1960-10-24T03:37:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 23rd, 11:38–12:26 on the 24th.

    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 23rd and 0 of 48 on the 24th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 14 s < 300 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1960: Monday 24 October.

    confidence: boundary (margin)

Say it like this

In Baoding, Nāga Caturthī 1960 falls on Monday 24 October. Caturthī runs from 14:03 on Sun 23 Oct to 11:38 on Mon 24 Oct, and reaches madhyāhna on neither day. It is 0 min 14 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1960/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 24 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 24 Oct
compat-drikpanchangComparison profileMon 24 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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles22:03 → 19:3811:1348 min11:130 min23 Oct
Chicago01:03 → 22:3812:1148 min12:100 min23 Oct
Jersey City02:03 → 23:3812:1648 min12:160 min23 Oct
Port of Spain02:03 → 23:3811:2648 min11:260 min23 Oct
London06:03 → 03:3811:2048 min11:200 min23 Oct
Durban08:03 → 05:3811:1648 min11:160 min23 Oct
Dubai10:03 → 07:3811:3948 min11:390 min23 Oct
Delhi11:33 → 09:0811:4148 min11:410 min23 Oct
Kolkata11:33 → 09:0810:5711 min10:570 min23 Oct
Singapore13:33 → 11:0811:550 min11:550 min24 Oct
Sydney16:03 → 13:3811:160 min11:1648 min24 Oct
Suva18:03 → 15:3811:270 min11:2748 min24 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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