11 April 2013.माह - चैत्र, नक्षत्र - अश्विनी,तिथि - शुक्ल पक्ष प्रतिपदा,त्यौहार - वासंतीय नवरात्र प्रारम्भ, कलश स्थापन, चन्द्रदर्शन.

Vikram Samvat is the calendar established by Indian emperor Vikramaditya. The Vikram calendar was commonly used in North India, and is still used. It uses lunar months and solar sidereal year.

Months in Vikram Samvat system.

No.	Name	Hindi	Days
1	Baishakh	बैशाख	30 / 31
2	Jetha	जेठ or ज्येष्ठ	31 / 32
3	Asar	असार or आशाढ	31 / 32
4	Saaun	साउन or श्रावण	31 / 32
5	Bhadau	भदौ or भाद्र	31 / 32
6	Asoj	असोज or आश्विन	30 / 31
7	Kartik	कात्तिक or कार्तिक	29 / 30
8	Mangsir	मंसिर or मार्ग	29 / 30
9	Poush	पुष or पौष	29 / 30
10	Magh	माघ	29 / 30
11	Falgun	फागुन or फाल्गुण	29 / 30
12	Chaitra	चैत or चैत्र	30 / 31

History: This calendar derives its name from the original king Vikramaditya of Ujjain. After the rise of the Rana oligarchs in Nepal, Vikram Sambat came into unofficial use along with the official Shaka Sambat for quite some time. They discontinued Shaka Sambat in its 1823rd year, and replaced it with Vikram Samwat for official use since then to date. Vikram Sambat came into official use in its 1958th year. The calendar is widely in use in western India, where it is known as the Vikram Samvat.

Significance importance of this day/Tithi

1. Natural: Towards the first day of the month of Chaitra (Padva), the sun assumes a position above the Vasant intersection (the point of intersection of the equator and the meridians) and the spring season commences. In Shrimadbhagvadgita (10.35), The Lord says, ‘Among the seasons, the exhilarating Vasant season (spring) is my manifestation’. In this season, the weather is pleasant and exhilarating. In the Shishir season (autumn) the trees shed their leaves. Towards Padva, trees bear new foliage and appear fresh. 

2. Historical: Rama slayed Vali on this day. Lord Ramachandra returned to Ayodhya after slaying the evil demons and Ravan on this very day. The Shakas too defeated the Huns on this day. This day also commemorates the commencement of the Shalivahan calendar after Shalivahan vanquished his enemies.
3.Spiritual: 3 A. Creation of the universe: Since on this day Lord Brahma created the universe and the Satyayug began, it marks the commencement of the New Year.
3 B. One among the three and a half auspicious days (‘Muhurts’): Gudhipadva, Akshay trutiya and Dasra (Vijayadashmi) each make up one, and the first day of the Hindu lunar month of Kartik comprises half of the total three and a half auspicious days. The special feature of these three and a half auspicious days is that unlike other days when one has to choose an auspicious moment to perform a ritual, in contrast, on these auspicious days one does not need to, as every moment of these days is auspicious. 

Today on 11^th april 2013 Chaitra Navratri started which ends on April 19^th also Gudi Padwa and Ugadi is celeberate in southern and western part of the country.

 

Chaitra Navratri, also known as Chait Navratras, as the name indicates is observed during the Chaitra month (March – April) in a traditional Hindu calendar followed in North India. Chaitra Navaratri 2013 begins on April 11 and ends on April 19. The festival is dedicated to Goddess Shakti and three of her most popular forms– Goddess Durga, Lakshmi and Saraswati – are worshipped during the period. It begins on the first day of the Chaitra month and ends with Ram Navami.

Complied by Amit Daga with inputs from Wikipedia and Hindu-Blog.com & hindujagruti.com

Today is special date for the blogger also as incidentally he was born on this calender date 11th April and Married also with whom the blogger loves.