Onam 2027 (popular practice)

Onam is popular practice; no text read gives the day. Tiruvoṇam (Thiruvonam) in the month of Chiṅṅam (Chingam) in 2027, by our stated rule, for Kochi, Thiruvananthapuram and your city.

Popular practice; no text read gives the day.

Onam 2027 in Kochi

Sunday, 12 September

Onam is in 329 days.

Tiruvoṇam (Śravaṇa)Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
Atham (our reading; popular practice)Friday, 3 September
Chiṅṅam18 August to 17 September

Our rule

Popular practice; no text read gives the day. The six-nāḍikā test is our statement of common Kerala usage, not a rule from a text.

  • A civil day belongs to Chiṅṅam when the Sun is in sidereal Siṃha at its sunrise.
  • Onam, Tiruvoṇam, is the Chiṅṅam day whose sunrise falls in the Śravaṇa nakṣatra with at least six nāḍikās (2 h 24 min) of Śravaṇa left after it. If less remains, Onam is the day before, which holds most of it.
  • When Chiṅṅam holds two Tiruvoṇams, both are shown; the rule gives two days and does not choose.
  • Atham, the Hasta day that opens the festival (our reading; popular practice), is the last day before Tiruvoṇam whose sunrise falls in Hasta with six nāḍikās of it left; if less remains, it is the day before. It can fall in the last days of Karkaṭakam, before Chiṅṅam begins. The festival runs from Atham to Tiruvoṇam.

In Kochi, Śravaṇa holds sunrise on Sunday, 12 September and runs until Mon 13 Sep, 06:05, six nāḍikās or more after it, so Tiruvoṇam is that day.

Atham is on Friday, 3 September: Hasta holds that sunrise and runs until Fri 3 Sep, 15:53, six nāḍikās or more after it (our reading; popular practice). The festival runs from Atham to Tiruvoṇam.

The texts

No text read gives Onam. The Śravaṇa-dvādaśī and the Vāmana-jayantī share its Vāmana story, but they are lunar days and give no date for it. DS pp. 56, 58

Onam 2027 around the world

Each city’s own sunrise
Sunday, 12 September
  • KochiŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • ThiruvananthapuramŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • DelhiŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • MumbaiŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • KolkataŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • ChennaiŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • BengaluruŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • HyderabadŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • AhmedabadŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • PuneŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • JaipurŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • LucknowŚravaṇa Sun 12 Sep, 02:58 to Mon 13 Sep, 06:05
  • LondonŚravaṇa Sat 11 Sep, 22:28 to Mon 13 Sep, 01:35
  • New York CityŚravaṇa Sat 11 Sep, 17:28 to Sun 12 Sep, 20:35
  • TorontoŚravaṇa Sat 11 Sep, 17:28 to Sun 12 Sep, 20:35
  • DubaiŚravaṇa Sun 12 Sep, 01:28 to Mon 13 Sep, 04:35
  • SingaporeŚravaṇa Sun 12 Sep, 05:28 to Mon 13 Sep, 08:35
Monday, 13 September
  • SydneyŚravaṇa Sun 12 Sep, 07:28 to Mon 13 Sep, 10:35

Other years: Onam 2028, Onam 2029; all Onam dates.

Questions

By our stated rule; popular practice throughout.

When is Onam 2027?

In Kochi, on Sunday, 12 September 2027: Tiruvoṇam in the month of Chiṅṅam, by our stated rule. The festival runs from Atham, on Friday, 3 September (our reading; popular practice), to Tiruvoṇam. In Sydney, it is Monday, 13 September. Popular practice; no text read gives the day.

How is the Onam date found?

By our stated rule, from common Kerala usage: Onam is the day in the solar month of Chiṅṅam (Chingam) whose sunrise falls in the Śravaṇa nakṣatra (Tiruvoṇam) with at least six nāḍikās, 2 h 24 min, of it left; if less remains, the day before. A day is in Chiṅṅam when the Sun is in sidereal Siṃha at its sunrise.

Is Onam in the classical texts?

No. The Nirṇaya-sindhu, the Dharmasindhu and the Vratarāja have no Onam. The Śravaṇa-dvādaśī and the Vāmana-jayantī share its Vāmana story, but they are lunar days and give no date for it. DS pp. 56, 58

Why is the date different in Sydney or other cities?

The Sun enters Siṃha and the Moon enters and leaves Śravaṇa at the same moment everywhere, but sunrise comes at different hours. The sunrise that holds Śravaṇa with six nāḍikās left can then fall on another day.

How the day is found

Read the methodology
Basis
Popular practice; no text read gives the day. The rule is ours, stated in full.
Chiṅṅam
The civil days whose sunrise has the Sun in sidereal Siṃha (Lahiri ayanāṃśa), for the chosen city.
Tiruvoṇam
The Chiṅṅam day whose sunrise is in Śravaṇa with six nāḍikās (2 h 24 min) or more of it left. When less is left, Tiruvoṇam is the day before.
Atham
The last day before Tiruvoṇam whose sunrise is in Hasta with six nāḍikās or more of it left. When less is left, Atham is the day before. Our reading; popular practice.
Sunrise
At the centre of the Sun’s disc, with refraction, for the chosen city. Every date is that city’s own.

Sunrise and sunset at the centre of the Sun’s disc, with refraction · each city’s own time · Swiss Ephemeris · Method