Ruling · Śivarātri · 1908

Friday 31 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 8 min 48 s.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Friday 31 January

Taken. The only night Caturdaśī reaches.

niśītha begins 00:07  00:55 niśītha ends
Caturdaśī begins 23:58:32
23:1923:4300:0700:3100:5501:1901:43

48 of 48 minutes covered

Night of Saturday 1 February

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:07  00:55 niśītha ends
23:1923:4300:0700:3100:5501:1901:43

0 of 48 minutes covered

Caturdaśī presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 23:59 on Fri 31 Jan to 20:22 on Sat 1 Feb.

    1908-01-31T15:58:33Z → 1908-02-01T12:21:51Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:07–00:55 on the 31st, 00:07–00:55 on the 1st.

    nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 31st and 0 of 48 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108

  4. 04

    Tie-break

    Only one night qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 528 s

  5. 05

    Ruling

    Śivarātri, Baoding, 1908: Friday 31 January.

    confidence: determinate

Say it like this

In Baoding, Śivarātri 1908 falls on Friday 31 January. Caturdaśī runs from 23:59 on Fri 31 Jan to 20:22 on Sat 1 Feb and covers all of niśītha that night.

ahargana.org/baoding/festivals/1908/shivaratri?on=1908-01-31 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 31 Jan
Ahargaṇa, classicalDisc centre, no refractionFri 31 Jan
compat-drikpanchangComparison profileFri 31 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/shivaratri · ruleset 2026.3-draft

Month
Every lunation
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Niśītha
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 108

“The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108. The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīNiśītha 31stCoveredNiśītha 1stCoveredRuled
Los Angeles07:59 → 04:2223:4248 min23:420 min31 Jan
Chicago09:59 → 06:2223:4048 min23:400 min31 Jan
Jersey City10:59 → 07:2223:4648 min23:460 min31 Jan
Port of Spain11:59 → 08:2223:5648 min23:560 min31 Jan
London15:59 → 12:2223:5048 min23:500 min31 Jan
Durban17:59 → 14:2223:4648 min23:460 min31 Jan
Dubai19:40 → 16:0323:4948 min23:490 min31 Jan
Delhi21:29 → 17:5200:1048 min00:110 min31 Jan
Kolkata21:29 → 17:5223:2648 min23:260 min31 Jan
Singapore22:59 → 19:2223:5448 min23:540 min31 Jan
Sydney01:59 → 22:2223:450 min23:450 min31 Jan
Suva03:54 → 00:1723:510 min23:5126 min1 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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