Ruling · Tila Caturthī · 2020

Tuesday 28 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 258 minutes.

Decide it for

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 Tuesday 28 January

Taken. The only evening Caturthī reaches.

17:34 sunsetpradoṣa ends 19:25
17:1017:3417:5818:2218:4619:1019:3419:58

111 of 111 minutes covered

Evening of Wednesday 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 10:52 on Tue 28 Jan to 13:16 on Wed 29 Jan.

    2020-01-28T02:52:23Z → 2020-01-29T05:16:14Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:34–19:25 on the 28th, 17:35–19:26 on the 29th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 111 of 111 minutes on the 28th and 0 of 111 on the 29th.

    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 15508 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2020: Tuesday 28 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2020 falls on Tuesday 28 January. Caturthī runs from 10:52 on Tue 28 Jan to 13:16 on Wed 29 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2020/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 28 Jan
compat-drikpanchangComparison profileTue 28 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 28thCoveredSunset 29thCoveredRuled
Los Angeles18:52 → 21:1617:19108 min17:200 min28 Jan
Chicago20:52 → 23:1617:00113 min17:010 min28 Jan
Jersey City21:52 → 00:1617:08112 min17:090 min28 Jan
Port of Spain22:52 → 01:1618:0899 min18:090 min28 Jan
London02:52 → 05:1616:41120 min16:430 min28 Jan
Durban04:52 → 07:1618:5683 min18:560 min28 Jan
Dubai06:52 → 09:1618:00104 min18:010 min28 Jan
Delhi08:22 → 10:4617:56106 min17:570 min28 Jan
Kolkata08:22 → 10:4617:21103 min17:220 min28 Jan
Singapore10:52 → 13:1619:1996 min19:190 min28 Jan
Sydney13:52 → 16:1620:0381 min20:030 min28 Jan
Suva14:52 → 17:1618:4788 min18:470 min28 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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