Ruling · Ratha Saptamī · 2018

Wednesday 24 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 629 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Wednesday 24 January

Taken. The only dawn Saptamī reaches.

05:39 aruṇodaya beginssunrise 07:31
05:1505:3906:0306:2706:5107:1507:3908:03

112 of 112 minutes covered

Dawn of Thursday 25 January

Saptamī is absent from aruṇodaya. Not taken.

05:38 aruṇodaya beginssunrise 07:31
05:1405:3806:0206:2606:5007:1407:3808:02

0 of 112 minutes covered

Saptamī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Saptamī runs from 19:10 on Tue 23 Jan to 18:47 on Wed 24 Jan.

    2018-01-23T11:10:17Z → 2018-01-24T10:46:58Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:39–07:31 on the 24th, 05:38–07:31 on the 25th.

    arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 112 of 112 minutes on the 24th and 0 of 112 on the 25th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one dawn qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 37711 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2018: Wednesday 24 January.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 2018 falls on Wednesday 24 January. Saptamī runs from 19:10 on Tue 23 Jan to 18:47 on Wed 24 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2018/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 24 Jan
Ahargaṇa, classicalDisc centre, no refractionWed 24 Jan
compat-drikpanchangComparison profileWed 24 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/ratha-saptami · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Saptamī
Kāla
Aruṇodaya
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“S 7 Ratha saptami (covering 4 ghatikas before sunrise), Acala saptami, Vidhana saptami, Arogya saptami [purvaviddha].” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSaptamīAruṇodaya 23rdCoveredAruṇodaya 24thCoveredRuled
Los Angeles03:10 → 02:4705:06110 min05:060 min23 Jan
Chicago05:10 → 04:4705:17114 min05:160 min23 Jan
Jersey City06:10 → 05:4705:2064 min05:2027 min23 Jan
Port of Spain07:10 → 06:4704:510 min04:5199 min24 Jan
London11:10 → 10:4705:490 min05:48122 min24 Jan
Durban13:10 → 12:4703:540 min03:5583 min24 Jan
Dubai15:10 → 14:4705:200 min05:20105 min24 Jan
Delhi16:40 → 16:1705:270 min05:26107 min24 Jan
Kolkata16:40 → 16:1704:340 min04:34104 min24 Jan
Singapore19:10 → 18:4705:390 min05:3996 min24 Jan
Sydney22:10 → 21:4704:470 min04:4880 min24 Jan
Suva23:10 → 22:4704:200 min04:2088 min24 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ratha-saptami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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