Ruling · Tila Caturthī · 2048

Saturday 18 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 186 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 18 January

Taken. The only evening Caturthī reaches.

17:22 sunsetpradoṣa ends 19:16
16:5817:2217:4618:1018:3418:5819:2219:46

114 of 114 minutes covered

Evening of Sunday 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

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

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 14:17 on Sat 18 Jan to 13:48 on Sun 19 Jan.

    2048-01-18T06:16:49Z → 2048-01-19T05:48:01Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:22–19:16 on the 18th, 17:24–19:17 on the 19th.

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

  3. 03

    Rule

    Caturthī must be present during pradoṣa. It covers 114 of 114 minutes on the 18th and 0 of 113 on the 19th.

    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 11139 s

  5. 05

    Ruling

    Tila Caturthī, Baoding, 2048: Saturday 18 January.

    confidence: determinate

Say it like this

In Baoding, Tila Caturthī 2048 falls on Saturday 18 January. Caturthī runs from 14:17 on Sat 18 Jan to 13:48 on Sun 19 Jan and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2048/tila-chaturthi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 18 Jan
Ahargaṇa, classicalDisc centre, no refractionSat 18 Jan
compat-drikpanchangComparison profileSat 18 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 18thCoveredSunset 19thCoveredRuled
Los Angeles22:17 → 21:4817:09110 min17:100 min18 Jan
Chicago00:17 → 23:4816:48116 min16:490 min18 Jan
Jersey City01:17 → 00:4816:56115 min16:580 min18 Jan
Port of Spain02:17 → 01:4818:0499 min18:040 min18 Jan
London06:17 → 05:4816:25124 min16:260 min18 Jan
Durban08:17 → 07:4819:0082 min19:000 min18 Jan
Dubai10:17 → 09:4817:52106 min17:530 min18 Jan
Delhi11:47 → 11:1817:48108 min17:490 min18 Jan
Kolkata11:47 → 11:1817:15105 min17:150 min18 Jan
Singapore14:17 → 13:4819:1696 min19:170 min18 Jan
Sydney17:17 → 16:4820:0879 min20:080 min18 Jan
Suva18:17 → 17:4818:4888 min18:480 min18 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

About Ahargaṇa