Ruling · Mahāśivarātri (Shivratri) · 2017

Friday 24 February

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 46 s away. Say “contested”.

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 24 February

Taken. The only night Caturdaśī reaches.

niśītha begins 00:07  00:55 niśītha ends
Caturdaśī begins 00:08:41
23:1923:4300:0700:3100:5501:1901:43

46 of 48 minutes covered, the last 46

Night of Saturday 25 February

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:07  00:55 niśītha ends
Caturdaśī ends 23:50:48
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 00:09 on Sat 25 Feb to 23:51 on Sat 25 Feb.

    2017-02-24T16:08:42Z → 2017-02-25T15:50:49Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:07–00:55 on the 24th, 00:07–00:55 on the 25th.

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

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 46 of 48 minutes on the 24th and 0 of 48 on the 25th.

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

  4. 04

    Tie-break

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

    priority: disputed → only-day · margin 106 s < 300 s

  5. 05

    Ruling

    Mahāśivarātri, Baoding, 2017: Friday 24 February.

    confidence: boundary (margin)

Say it like this

In Baoding, Mahāśivarātri (Shivratri) 2017 falls on Friday 24 February. Caturdaśī runs from 00:09 on Sat 25 Feb to 23:51 on Sat 25 Feb and covers 46 of 48 minutes of niśītha that night. It is 1 min 46 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2017/maha-shivaratri · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 24 Feb
Ahargaṇa, classicalDisc centre, no refractionFri 24 Feb
compat-drikpanchangComparison profileFri 24 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/maha-shivaratri · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Niśītha
Priority
Disputed
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 105

“K 14 Mahasivaratri (nisithavyapini) — In some opinion it is to be observed on nisitha and in some opinion on pradosa. If occurs on two successive nisithas then according to Hemadri it is to be observed on the first day and according to Madhava, to be observed on the second day” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105. 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 24thCoveredNiśītha 25thCoveredRuled
Los Angeles08:09 → 07:5123:4248 min23:420 min24 Feb
Chicago10:09 → 09:5123:3948 min23:390 min24 Feb
Jersey City11:09 → 10:5123:4548 min23:450 min24 Feb
Port of Spain12:09 → 11:5123:5548 min23:550 min24 Feb
London16:09 → 15:5123:4948 min23:490 min24 Feb
Durban18:09 → 17:5123:4548 min23:450 min24 Feb
Dubai20:09 → 19:5100:0848 min00:080 min24 Feb
Delhi21:39 → 21:2100:1048 min00:100 min24 Feb
Kolkata21:39 → 21:2123:2548 min23:250 min24 Feb
Singapore00:09 → 23:5100:5448 min00:540 min24 Feb
Sydney03:09 → 02:5100:450 min00:4448 min25 Feb
Suva04:09 → 03:5123:560 min23:5548 min25 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
maha-shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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