Ruling · Tila Caturthī · 1913

Monday 10 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 105 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 Sunday 9 February

Caturthī is absent from pradoṣa. Not taken.

17:48 sunsetpradoṣa ends 19:36
17:2417:4818:1218:3619:0019:2419:48

0 of 108 minutes covered

Evening of Monday 10 February

Taken. The only evening Caturthī reaches.

17:49 sunsetpradoṣa ends 19:36
17:2517:4918:1318:3719:0119:2519:49

108 of 108 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 21:20 on Sun 9 Feb to 23:48 on Mon 10 Feb.

    1913-02-09T13:20:10Z → 1913-02-10T15:48:22Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:48–19:36 on the 9th, 17:49–19:36 on the 10th.

    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 108 minutes on the 9th and 108 of 108 on the 10th.

    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 6280 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 1913: Monday 10 February.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 1913 falls on Monday 10 February. Caturthī runs from 21:20 on Sun 9 Feb to 23:48 on Mon 10 Feb and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1913/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 10 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 10 Feb
compat-drikpanchangComparison profileMon 10 Feb
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 9thCoveredSunset 10thCoveredRuled
Los Angeles05:20 → 07:4817:31106 min17:320 min9 Feb
Chicago07:20 → 09:4817:15109 min17:170 min9 Feb
Jersey City08:20 → 10:4817:23109 min17:240 min9 Feb
Port of Spain09:20 → 11:4818:1398 min18:130 min9 Feb
London13:20 → 15:4817:03115 min17:050 min9 Feb
Durban15:20 → 17:4818:4986 min18:480 min9 Feb
Dubai17:01 → 19:2917:49103 min17:5099 min9 Feb
Delhi18:50 → 21:1818:0660 min18:07104 min10 Feb
Kolkata18:50 → 21:1817:2921 min17:30102 min10 Feb
Singapore20:20 → 22:4818:210 min18:2195 min10 Feb
Sydney23:20 → 01:4818:540 min18:5484 min10 Feb
Suva01:15 → 03:4318:390 min18:3990 min10 Feb
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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