Ruling · Ratha Saptamī · 2080

Monday 29 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 634 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 Sunday 28 January

Saptamī is absent from aruṇodaya. Not taken.

05:37 aruṇodaya beginssunrise 07:28
05:1305:3706:0106:2506:4907:1307:3708:01

0 of 111 minutes covered

Dawn of Monday 29 January

Taken. The only dawn Saptamī reaches.

05:37 aruṇodaya beginssunrise 07:28
05:1305:3706:0106:2506:4907:1307:3708:01

111 of 111 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 18:19 on Sun 28 Jan to 18:02 on Mon 29 Jan.

    2080-01-28T10:18:52Z → 2080-01-29T10:01:35Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 05:37–07:28 on the 28th, 05:37–07:28 on the 29th.

    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 111 minutes on the 28th and 111 of 111 on the 29th.

    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 38034 s

  5. 05

    Ruling

    Ratha Saptamī, Baoding, 2080: Monday 29 January.

    confidence: determinate

Say it like this

In Baoding, Ratha Saptamī 2080 falls on Monday 29 January. Saptamī runs from 18:19 on Sun 28 Jan to 18:02 on Mon 29 Jan and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/2080/ratha-saptami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 29 Jan
Ahargaṇa, classicalDisc centre, no refractionMon 29 Jan
compat-drikpanchangComparison profileMon 29 Jan
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 28thCoveredAruṇodaya 29thCoveredRuled
Los Angeles02:19 → 02:0205:04109 min05:040 min28 Jan
Chicago04:19 → 04:0205:14113 min05:140 min28 Jan
Jersey City05:19 → 05:0205:18111 min05:170 min28 Jan
Port of Spain06:19 → 06:0204:5111 min04:5171 min29 Jan
London10:19 → 10:0205:450 min05:44120 min29 Jan
Durban12:19 → 12:0203:580 min03:5983 min29 Jan
Dubai14:19 → 14:0205:190 min05:19104 min29 Jan
Delhi15:49 → 15:3205:260 min05:25106 min29 Jan
Kolkata15:49 → 15:3204:340 min04:34103 min29 Jan
Singapore18:19 → 18:0205:400 min05:4196 min29 Jan
Sydney21:19 → 21:0204:510 min04:5281 min29 Jan
Suva22:19 → 22:0204:220 min04:2389 min29 Jan
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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