Ruling · Ratha Saptamī · 1900

Tuesday 6 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 330 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 Monday 5 February

Saptamī is absent from aruṇodaya. Not taken.

05:38 aruṇodaya beginssunrise 07:27
05:1405:3806:0206:2606:5007:1407:38

0 of 109 minutes covered

Dawn of Tuesday 6 February

Taken. The only dawn Saptamī reaches.

05:37 aruṇodaya beginssunrise 07:26
05:1305:3706:0106:2506:4907:1307:37

109 of 109 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 14:24 on Mon 5 Feb to 12:56 on Tue 6 Feb.

    1900-02-05T06:19:16Z → 1900-02-06T04:50:56Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:38–07:27 on the 5th, 05:37–07:26 on the 6th.

    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 109 minutes on the 5th and 109 of 109 on the 6th.

    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 19799 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 1900: Tuesday 6 February.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 1900 falls on Tuesday 6 February. Saptamī runs from 14:24 on Mon 5 Feb to 12:56 on Tue 6 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1900/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 6 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 6 Feb
compat-drikpanchangComparison profileTue 6 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 5thCoveredAruṇodaya 6thCoveredRuled
Los Angeles22:19 → 20:5105:01107 min05:000 min5 Feb
Chicago00:19 → 22:5105:09111 min05:080 min5 Feb
Jersey City01:19 → 23:5105:13110 min05:120 min5 Feb
Port of Spain02:19 → 00:5104:5198 min04:510 min5 Feb
London06:19 → 04:5105:3775 min05:350 min5 Feb
Durban07:49 → 06:2103:330 min03:3485 min6 Feb
Dubai10:00 → 08:3204:580 min04:58103 min6 Feb
Delhi11:40 → 10:1205:140 min05:14105 min6 Feb
Kolkata11:40 → 10:1204:230 min04:23102 min6 Feb
Singapore13:14 → 11:4604:360 min04:3796 min6 Feb
Sydney16:19 → 14:5103:580 min03:5883 min6 Feb
Suva18:14 → 16:4604:210 min04:2189 min6 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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