Ruling · Tila Caturthī · 1971

Saturday 30 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 31 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 Friday 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 Saturday 30 January

Taken. The only evening Caturthī reaches.

17:36 sunsetpradoṣa ends 19:27
Caturthī ends 18:06:32
17:1217:3618:0018:2418:4819:1219:3620:00

31 of 111 minutes covered, the first 31

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 21:10 on Fri 29 Jan to 18:07 on Sat 30 Jan.

    1971-01-29T13:09:41Z → 1971-01-30T10:06:32Z

  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 31 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 1842 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1971: Saturday 30 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1971 falls on Saturday 30 January. Caturthī runs from 21:10 on Fri 29 Jan to 18:07 on Sat 30 Jan and covers 31 of 111 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/1971/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 30 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 30 Jan
compat-drikpanchangComparison profileSat 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 Angeles05:10 → 02:0717:20108 min17:210 min29 Jan
Chicago07:10 → 04:0717:01113 min17:020 min29 Jan
Jersey City08:10 → 05:0717:09112 min17:110 min29 Jan
Port of Spain09:10 → 06:0718:0999 min18:090 min29 Jan
London14:10 → 11:0717:43120 min17:450 min29 Jan
Durban15:10 → 12:0718:5684 min18:550 min29 Jan
Dubai17:10 → 14:0718:01104 min18:010 min29 Jan
Delhi18:40 → 15:3717:5763 min17:580 min29 Jan
Kolkata18:40 → 15:3717:2226 min17:230 min29 Jan
Singapore20:40 → 17:3718:490 min18:500 min29 Jan
Sydney23:10 → 20:0719:030 min19:0264 min30 Jan
Suva01:10 → 22:0718:470 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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