Ruling · Tila Caturthī · 2037

Tuesday 20 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 347 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 19 January

Caturthī is absent from pradoṣa. Not taken.

17:24 sunsetpradoṣa ends 19:17
17:0017:2417:4818:1218:3619:0019:2419:48

0 of 113 minutes covered

Evening of Tuesday 20 January

Taken. The only evening Caturthī reaches.

17:25 sunsetpradoṣa ends 19:18
17:0117:2517:4918:1318:3719:0119:2519:49

113 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 01:05 on Tue 20 Jan to 03:49 on Wed 21 Jan.

    2037-01-19T17:04:43Z → 2037-01-20T19:48:33Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:24–19:17 on the 19th, 17:25–19:18 on the 20th.

    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 113 minutes on the 19th and 113 of 113 on the 20th.

    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 20834 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2037: Tuesday 20 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2037 falls on Tuesday 20 January. Caturthī runs from 01:05 on Tue 20 Jan to 03:49 on Wed 21 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2037/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 20 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 20 Jan
compat-drikpanchangComparison profileTue 20 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 19thCoveredSunset 20thCoveredRuled
Los Angeles09:05 → 11:4917:11110 min17:120 min19 Jan
Chicago11:05 → 13:4916:50115 min16:510 min19 Jan
Jersey City12:05 → 14:4916:58114 min17:000 min19 Jan
Port of Spain13:05 → 15:4918:0599 min18:050 min19 Jan
London17:05 → 19:4916:2786 min16:29123 min20 Jan
Durban19:05 → 21:4918:5977 min18:5982 min20 Jan
Dubai21:05 → 23:4917:540 min17:54105 min20 Jan
Delhi22:35 → 01:1917:490 min17:50107 min20 Jan
Kolkata22:35 → 01:1917:160 min17:17104 min20 Jan
Singapore01:05 → 03:4919:170 min19:1796 min20 Jan
Sydney04:05 → 06:4920:070 min20:0780 min20 Jan
Suva05:05 → 07:4918:480 min18:4888 min20 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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