Ruling · Ratha Saptamī · 1990

Friday 2 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 493 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 Thursday 1 February

Saptamī is absent from aruṇodaya. Not taken.

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

0 of 110 minutes covered

Dawn of Friday 2 February

Taken. The only dawn Saptamī reaches.

05:34 aruṇodaya beginssunrise 07:24
05:1005:3405:5806:2206:4607:1007:3407:58

110 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 17:46 on Thu 1 Feb to 15:37 on Fri 2 Feb.

    1990-02-01T09:46:10Z → 1990-02-02T07:37:04Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:35–07:25 on the 1st, 05:34–07:24 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 0 of 110 minutes on the 1st and 110 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 29560 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 1990: Friday 2 February.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 1990 falls on Friday 2 February. Saptamī runs from 17:46 on Thu 1 Feb to 15:37 on Fri 2 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1990/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 2 Feb
Ahargaṇa, classicalDisc centre, no refractionFri 2 Feb
compat-drikpanchangComparison profileFri 2 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 1stCoveredAruṇodaya 2ndCoveredRuled
Los Angeles01:46 → 23:3705:03108 min05:020 min1 Feb
Chicago03:46 → 01:3705:12112 min05:110 min1 Feb
Jersey City04:46 → 02:3705:16111 min05:150 min1 Feb
Port of Spain05:46 → 03:3704:5143 min04:510 min1 Feb
London09:46 → 07:3705:410 min05:40117 min2 Feb
Durban11:46 → 09:3704:010 min04:0184 min2 Feb
Dubai13:46 → 11:3705:180 min05:18104 min2 Feb
Delhi15:16 → 13:0705:240 min05:24105 min2 Feb
Kolkata15:16 → 13:0704:330 min04:33103 min2 Feb
Singapore17:46 → 15:3705:410 min05:4196 min2 Feb
Sydney20:46 → 18:3704:540 min04:5582 min2 Feb
Suva21:46 → 19:3704:240 min04:2589 min2 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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