Ruling · Ratha Saptamī · 1921

Tuesday 15 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 491 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 14 February

Saptamī is absent from aruṇodaya. Not taken.

05:26 aruṇodaya beginssunrise 07:12
05:0205:2605:5006:1406:3807:0207:26

0 of 107 minutes covered

Dawn of Tuesday 15 February

Taken. The only dawn Saptamī reaches.

05:25 aruṇodaya beginssunrise 07:11
05:0105:2505:4906:1306:3707:0107:25

106 of 106 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 15:50 on Mon 14 Feb to 15:22 on Tue 15 Feb.

    1921-02-14T07:50:18Z → 1921-02-15T07:21:35Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:26–07:12 on the 14th, 05:25–07:11 on the 15th.

    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 107 minutes on the 14th and 106 of 106 on the 15th.

    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 29434 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 1921: Tuesday 15 February.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 1921 falls on Tuesday 15 February. Saptamī runs from 15:50 on Mon 14 Feb to 15:22 on Tue 15 Feb and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1921/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 15 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 15 Feb
compat-drikpanchangComparison profileTue 15 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 14thCoveredAruṇodaya 15thCoveredRuled
Los Angeles23:50 → 23:2204:55105 min04:540 min14 Feb
Chicago01:50 → 01:2205:01108 min05:000 min14 Feb
Jersey City02:50 → 02:2205:05107 min05:040 min14 Feb
Port of Spain03:50 → 03:2204:4998 min04:490 min14 Feb
London07:50 → 07:2205:250 min05:24112 min15 Feb
Durban09:50 → 09:2204:090 min04:0987 min15 Feb
Dubai11:50 → 11:2205:130 min05:12102 min15 Feb
Delhi13:20 → 12:5205:180 min05:18103 min15 Feb
Kolkata13:20 → 12:5204:290 min04:28101 min15 Feb
Singapore14:50 → 14:2204:420 min04:4195 min15 Feb
Sydney17:50 → 17:2204:040 min04:0585 min15 Feb
Suva19:50 → 19:2204:290 min04:2990 min15 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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