Ruling · Nāga Caturthī · 1990

Monday 22 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 200 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 Monday 22 October

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

Midday of Tuesday 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct.

    1990-10-21T21:42:43Z → 1990-10-23T00:18:02Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 22nd, 11:38–12:26 on the 23rd.

    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 22nd and 0 of 48 on the 23rd.

    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 12017 s

  5. 05

    Ruling

    Nāga Caturthī, Baoding, 1990: Monday 22 October.

    confidence: determinate

Say it like this

In Baoding, Nāga Caturthī 1990 falls on Monday 22 October. Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1990/naga-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 22 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 22 Oct
compat-drikpanchangComparison profileMon 22 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 21stCoveredMadhyāhna 23rdCoveredRuled
Los Angeles14:43 → 17:1812:130 min12:130 min22 Oct
Chicago16:43 → 19:1812:110 min12:110 min22 Oct
Jersey City17:43 → 20:1812:170 min12:160 min22 Oct
Port of Spain17:43 → 20:1811:270 min11:260 min22 Oct
London22:43 → 01:1812:210 min12:200 min22 Oct
Durban23:43 → 02:1811:170 min11:170 min22 Oct
Dubai01:43 → 04:1811:390 min11:390 min22 Oct
Delhi03:13 → 05:4811:420 min11:410 min22 Oct
Kolkata03:13 → 05:4810:570 min10:570 min22 Oct
Singapore05:43 → 08:1812:250 min12:250 min22 Oct
Sydney07:43 → 10:1811:160 min11:160 min22 Oct
Suva09:43 → 12:1811:270 min11:2748 min23 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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