Raksha Bandhan rituals should not be done during Bhadra. Bhadra is malicious time which should be avoided for all auspicious work. Most Hindu religious texts, including Vratraj, advise to avoid Bhadra time to tie Rakhi during Raksha Bandhan festival.
It should be noted that Bhadra prevails during first half of Purnima Tithi. Hence one should wait for Bhadra to get over before starting any auspicious work. In North India it is customary to tie Rakhi in the morning which might not be suitable time to do it. The DrikPanchang’s team believes that it might be due to ignorance. When such information is easily available one should avoid tying Rakhi during Bhadra.
Some sources advise to avoid Bhadra Mukha and perform Rakhi ceremony during Bhadra Punchhaif it has to be done during Bhadra in early morning. However our team was not able to find any authority to validate this belief.