Ruling · Pongal · 2012

Sunday 15 January

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 253 minutes.

Decide it for

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two days

A tick is five ghaṭīs, two hours. The day is counted from the sunset before it to its own sunset.

Day of Saturday 14 January

The transit does not fall in this day. Not taken.

17:15 sunset beforesunset 17:16
16:5120:5100:5104:5108:5112:5116:51

Does not fall in this day

Day of Sunday 15 January

Taken. The transit falls in this day.

17:16 sunset beforesunset 17:16
Sun enters Makara 21:28:25
16:5220:5200:5204:5208:5212:5216:52

Falls in this day

The day, the window the rule readsThe instant the Sun enters Makara

How it was decided

  1. 01

    Aṅga

    The Sun enters Makara at 21:28 on Sat 14 Jan.

    2012-01-14T19:28:25Z · nirayana, lahiri-iae1985

  2. 02

    Kāla

    The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:16, and the day of the 15th ends at 17:16.

    sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 14th and the 15th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106

  4. 04

    Tie-break

    An instant falls in one day and no other. No tie-break is needed.

    day counted from sunset → only-day · margin 15169 s

  5. 05

    Ruling

    Pongal, Cairo, 2012: Sunday 15 January.

    confidence: determinate

Say it like this

In Cairo, Pongal 2012 falls on Sunday 15 January. The Sun enters Makara at 21:28 on Sat 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th. Counted from midnight, or counted from sunrise, as in Orissa, it is 14 January.

ahargana.org/cairo/festivals/2012/pongal · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 15 Jan
Ahargaṇa, classicalDisc centre, no refractionSun 15 Jan
compat-drikpanchangComparison profileSun 15 Jan
Counted from midnightCRC 1955, p. 106Sat 14 Jan
Counted from sunrise (the Orissa rule)CRC 1955, p. 244Sat 14 Jan
No institution has a recorded ruling for Cairo.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/pongal · ruleset 2026.3-draft

Sign entered
Makara
Zodiac
Nirayana
Ayanāṃśa
lahiri-iae1985
Day counted from
Sunset
Tie-break
None: an instant
Reference
CRC 1955, p. 106

“Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106. “The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day.” Calendar Reform Committee 1955, Rules of Samkranti, p. 244. The rule that heads the solar festivals, the day "taken to begin from midnight" (p. 106), is not applied to Pongal. It is kept on the first day of the month of Makara as the Tamil districts count it, a transit after sunset going to the next day (p. 244); the Rashtriya Panchang prints Pongal so.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceSun enters MakaraSunset before 14thCoveredSunset before 15thCoveredRuled
Los Angeles11:2817:04falls17:05no14 Jan
Chicago13:2816:42falls16:43no14 Jan
Jersey City14:2816:51falls16:52no14 Jan
Port of Spain15:2818:01falls18:02no14 Jan
London19:2816:16no16:18falls15 Jan
Durban21:2819:01no19:01falls15 Jan
Dubai23:2817:49no17:49falls15 Jan
Delhi00:5817:44no17:44falls15 Jan
Kolkata00:5817:11no17:12falls15 Jan
Singapore03:2819:14no19:15falls15 Jan
Sydney06:2820:09no20:09falls15 Jan
Suva08:2819:48no19:48falls15 Jan
Profile · tradition
pac-rp@2026.1 · smarta
Rule
pongal@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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