Ruling · Ratha Saptamī · 2020

Saturday 1 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 533 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 Saturday 1 February

Taken. The only dawn Saptamī reaches.

05:35 aruṇodaya beginssunrise 07:25
05:1105:3505:5906:2306:4707:1107:3507:59

110 of 110 minutes covered

Dawn of Sunday 2 February

Saptamī is absent from aruṇodaya. Not taken.

05:34 aruṇodaya beginssunrise 07:25
05:1005:3405:5806:2206:4607:1007:3407:58

0 of 110 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 18:22 on Fri 31 Jan to 20:41 on Sat 1 Feb.

    2020-01-31T10:22:09Z → 2020-02-01T12:41:12Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:35–07:25 on the 1st, 05:34–07:25 on the 2nd.

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

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 110 of 110 minutes on the 1st and 0 of 110 on the 2nd.

    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 31992 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2020: Saturday 1 February.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 2020 falls on Saturday 1 February. Saptamī runs from 18:22 on Fri 31 Jan to 20:41 on Sat 1 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2020/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 1 Feb
Ahargaṇa, classicalDisc centre, no refractionSat 1 Feb
compat-drikpanchangComparison profileSat 1 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/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 31stCoveredAruṇodaya 1stCoveredRuled
Los Angeles02:22 → 04:4105:03108 min05:030 min31 Jan
Chicago04:22 → 06:4105:12112 min05:1289 min31 Jan
Jersey City05:22 → 07:4105:16106 min05:16111 min1 Feb
Port of Spain06:22 → 08:4104:518 min04:5199 min1 Feb
London10:22 → 12:4105:420 min05:41119 min1 Feb
Durban12:22 → 14:4104:000 min04:0084 min1 Feb
Dubai14:22 → 16:4105:180 min05:18104 min1 Feb
Delhi15:52 → 18:1105:250 min05:24105 min1 Feb
Kolkata15:52 → 18:1104:330 min04:33103 min1 Feb
Singapore18:22 → 20:4105:410 min05:4196 min1 Feb
Sydney21:22 → 23:4104:530 min04:5482 min1 Feb
Suva22:22 → 00:4104:230 min04:2489 min1 Feb
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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