Shravan also is known as Savan, is considered one of the most precious and holiest months that fall under the Hindu calendar. As per the traditional Hindu mythology, Savan is the fifth month in the calendar. It is believed that on a full moon night, a star named Shravan Nakshatra, rules all over the sky and this is the reason why this significant month is named Shravan.
As almost all days that come under this holy month are considered as Shubh Arambh (good start), it is recommended to conduct every important religious ceremony and pooja during this period of time. Each Monday in this month is celebrated as Shravan Somwar. All over the temples, devotees assemble to perform Rudrabhishek, which is considered as the most powerful pooja of Lord Shiva during this month.
Also, each one of the follower fasts until the end of the day with an Akhand Diya placed inside the Mandir in their respected homes. The Akhand Diya or Nandadeep burns through the day symbolizing the pure respect and love towards Lord Shiva.
As per the Puranas, the episode of Samudra Manthan is very important. This symbolic event took place in the month of Shravan. During the Manthan 14 different rubies appeared from the ocean. Halahal, the fourteenth ruby which was considered the deadliest, remained untouched. The rest of the thirteen rubies were divided amongst the devas and asuras. Due to the disastrous abilities of Halahal, Lord Shiva drank it and stored its poison in its throat. After this incident, his throat turned blue because of the impact of poison and this is the reason why people named him Neel Kantha.
The impact of the poison was so harmful that Lord Shiva wore a crescent moon on his head and all the devas offered holy water from the river of Ganga to reduce the toxic effect. These activities took place in the month of Shravan and due to this, devotees offer Ganga water to Lord Shiva.