Ruling · Tila Caturthī · 1950

Saturday 21 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 58 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 Saturday 21 January

Taken. The only evening Caturthī reaches.

17:26 sunsetpradoṣa ends 19:19
17:0217:2617:5018:1418:3819:0219:2619:50

113 of 113 minutes covered

Evening of Sunday 22 January

Caturthī is absent from pradoṣa. Not taken.

17:27 sunsetpradoṣa ends 19:20
17:0317:2717:5118:1518:3919:0319:2719:51

0 of 113 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 15:19 on Sat 21 Jan to 16:29 on Sun 22 Jan.

    1950-01-21T07:18:54Z → 1950-01-22T08:28:32Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:26–19:19 on the 21st, 17:27–19:20 on the 22nd.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 113 of 113 minutes on the 21st and 0 of 113 on the 22nd.

    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 3496 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1950: Saturday 21 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1950 falls on Saturday 21 January. Caturthī runs from 15:19 on Sat 21 Jan to 16:29 on Sun 22 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1950/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 21 Jan
compat-drikpanchangComparison profileSat 21 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 21stCoveredSunset 22ndCoveredRuled
Los Angeles23:19 → 00:2917:12110 min17:130 min21 Jan
Chicago01:19 → 02:2916:51115 min16:520 min21 Jan
Jersey City02:19 → 03:2917:00114 min17:010 min21 Jan
Port of Spain03:19 → 04:2918:0599 min18:060 min21 Jan
London07:19 → 08:2916:29123 min16:310 min21 Jan
Durban09:19 → 10:2918:5982 min18:590 min21 Jan
Dubai11:19 → 12:2917:55105 min17:550 min21 Jan
Delhi12:49 → 13:5917:50107 min17:510 min21 Jan
Kolkata12:49 → 13:5917:17104 min17:170 min21 Jan
Singapore14:49 → 15:5918:4796 min18:480 min21 Jan
Sydney17:19 → 18:2919:0780 min19:070 min21 Jan
Suva19:19 → 20:2918:4857 min18:4888 min22 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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