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Introduction to World Tamil Calendar (WTC / Uthani in Tamil)

Today, Tamil people follows the Tamil Sidereal Calendar for celebrating festivals. Tamil calendar differs from International Civil calendar (widely in use) with varibale months and year lengths. This makes the people to be uncomfort. They not predict the calendar date without seeing panchang.

The New Tamil calendar proposed with Tropical Mean year length and fixed month lengths. This calendar follows the same leap year rule. So the mean tropical year maintains the span of 365.2425 days. The calendar dates permanently synchronized with Gregorian calendar. Now Indian National Calendar, Nanaksahi Calendar and Bengali calendars are synchronized to gregorian calendar.

Year

Tamil year system is not numerical system. It follows 60 year cycle. Thiruvalluvar Year is the official tamil calendar system in Tamilnadu. Thiruvalluvar year starts in the Month of Thai and Tamil New year starts in the month of Chithirai. So the New world Tamil calendar only changes the structure not the year.

Month

Current tamil calendar system, Days of the months varies from 29 days into 32 days dynamically. We will fix the dates of the months either 30 or 31 days only. Normal year consists of 5 months of 31 days and 7 month of 30 days (5 Kuril , 7 Nedil / 5 ocean, 7 continent). Leap Year consists 6 months of 30 days and 6 months of 30 days. 

Initially 5 months from chithirai to Avani will be fixed by 31 days. Remaining months are fixed by 30 days. In Leap year, Additional Day (Leap day) is added at the end of Thai Month to honor thiruvalluvar, tamil cultural festivals. Month names are either solar or Lunar


SI No

Month Names in Solar

Month Names in Lunar

Gregorian Date

Total Days

1

Mesham

Chithirai

Apr 14

31

2

Rishabam

Vaikaasi

May 15

31

3

Mithunam

Aani

June 15

31

4

Kadagam

Aadi

July 16

31

5

Simmam

Aavani

Aug 16

31

6

Kanni

Purattasi

Sep 16

30

7

Thulam

Aippasi

Oct 16

30

8

Vrichigam

Karthigai

Nov 15

30

9

Thanusu

Maargazhi

Dec 15

30

10

Magaram

Thai

Jan 14

30/31*

11

Kumbam

Maasi

Feb 13/14*

30

12

Meenam

Panguni

Mar 15

30


  • - Leap Year.
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