Raksha Bandhan 2021: Know the auspicious timings of the day, this year

The tradition of celebrating this festival is going on since ancient times. This festival is celebrated on the full moon day of Shravan month of the
Hindi calendar. Due to being celebrated on the full moon day, it is also called Rakhi Purnima in many places. This year Raksha Bandhan is on 22nd August, Sunday.

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Let us know the auspicious time of Raksha Bandhan and its mantra. auspicious time of Raksha Bandhan
Purnima Tithi Start: 21st August 2021 at 07 PM 
Purnima Tithi Closing: 22nd August 2021 till 05.31 pm
Shubh Muhurta: 06:15 am from morning to 05.31 pm
Shubh Muhurta for Raksha Bandhan: 01:42 PM to 04:18 PM
Duration of Raksha Bandhan: 11 hours 16 minutes

Chant this mantra while tying Rakshabandhan
Yen Baddho Bali: King Danavendro Mahabala.
Ten vampires bad name Raksha ma chal ma chal...
In the literal meaning of this mantra, the sister says while tying the Raksha sutra that I tie you with the same thread with which the great mighty King Bali was tied. O Rakshasa (Rakhi) you remain firm. Never deviate from your resolve to protect yourself. With this wish, a sister ties Rakhi on her brother's wrist.

https://www.myjyotish.com/astrology-blogs/singh-sankranti-2021-know-the-significance-rituals-and-auspicious-timings