Ruling · Ratha Saptamī · 2002

Wednesday 20 February

Boundaryin Baoding, under the Rashtriya Panchang method. Both dawns qualify and the rule does not say which to take. Say “contested”.

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 Tuesday 19 February

Qualifies with 67 of 105 minutes. Not taken.

05:20 aruṇodaya beginssunrise 07:05
Saptamī begins 05:58:05
04:5605:2005:4406:0806:3206:5607:20

67 of 105 minutes covered, the last 67

Dawn of Wednesday 20 February

Taken. Both dawns qualify; the rule is silent, and this one is covered longer.

05:19 aruṇodaya beginssunrise 07:04
04:5505:1905:4306:0706:3106:5507:19

105 of 105 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 05:58 on Tue 19 Feb to 07:30 on Wed 20 Feb.

    2002-02-18T21:58:06Z → 2002-02-19T23:30:18Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:20–07:05 on the 19th, 05:19–07:04 on the 20th.

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

  3. 03

    Rule

    Saptamī must be present during aruṇodaya. It covers 67 of 105 minutes on the 19th and 105 of 105 on the 20th.

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

  4. 04

    Tie-break

    Both dawns qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1571 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2002: Wednesday 20 February.

    confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Ratha Saptamī 2002 falls on Wednesday 20 February. Saptamī runs from 05:58 on Tue 19 Feb to 07:30 on Wed 20 Feb and covers all of aruṇodaya that dawn. It also reaches the previous dawn for 67 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/baoding/festivals/2002/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 20 Feb
Ahargaṇa, classicalDisc centre, no refractionWed 20 Feb
compat-drikpanchangComparison profileWed 20 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 18thCoveredAruṇodaya 19thCoveredRuled
Los Angeles13:58 → 15:3004:510 min04:50103 min19 Feb
Chicago15:58 → 17:3004:560 min04:55106 min19 Feb
Jersey City16:58 → 18:3005:010 min05:00105 min19 Feb
Port of Spain17:58 → 19:3004:480 min04:4897 min19 Feb
London21:58 → 23:3005:190 min05:17110 min19 Feb
Durban23:58 → 01:3004:110 min04:1288 min19 Feb
Dubai01:58 → 03:3005:100 min05:10101 min19 Feb
Delhi03:28 → 05:0005:150 min05:15102 min19 Feb
Kolkata03:28 → 05:0004:270 min04:26100 min19 Feb
Singapore05:58 → 07:3005:410 min05:4178 min20 Feb
Sydney08:58 → 10:3005:070 min05:070 min20 Feb
Suva09:58 → 11:3004:300 min04:310 min20 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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