Ruling · Tila Caturthī · 1990

Tuesday 30 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 145 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Monday 29 January

Caturthī is absent from pradoṣa. Not taken.

17:35 sunsetpradoṣa ends 19:26
17:1117:3517:5918:2318:4719:1119:3519:59

0 of 111 minutes covered

Evening of Tuesday 30 January

Taken. The only evening Caturthī reaches.

17:36 sunsetpradoṣa ends 19:27
17:1217:3618:0018:2418:4819:1219:3620:00

111 of 111 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan.

    1990-01-29T15:41:08Z → 1990-01-30T13:51:57Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:35–19:26 on the 29th, 17:36–19:27 on the 30th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 0 of 111 minutes on the 29th and 111 of 111 on the 30th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 8704 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1990: Tuesday 30 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1990 falls on Tuesday 30 January. Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan and covers all of pradoṣa that evening.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 30 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 30 Jan
compat-drikpanchangComparison profileTue 30 Jan
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/tila-chaturthi · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Caturthī
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīSunset 29thCoveredSunset 30thCoveredRuled
Los Angeles07:41 → 05:5217:20108 min17:210 min29 Jan
Chicago09:41 → 07:5217:02113 min17:030 min29 Jan
Jersey City10:41 → 08:5217:10112 min17:110 min29 Jan
Port of Spain11:41 → 09:5218:0999 min18:090 min29 Jan
London15:41 → 13:5216:44120 min16:460 min29 Jan
Durban17:41 → 15:5218:5684 min18:550 min29 Jan
Dubai19:41 → 17:5218:014 min18:020 min29 Jan
Delhi21:11 → 19:2217:570 min17:5884 min30 Jan
Kolkata21:11 → 19:2217:220 min17:23103 min30 Jan
Singapore23:41 → 21:5219:190 min19:2096 min30 Jan
Sydney02:41 → 00:5220:030 min20:0282 min30 Jan
Suva03:41 → 01:5218:470 min18:4789 min30 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
tila-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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