1st August Pagan Lammas/Lughnasadh
Lughnasadh is the first of three harvest festivals in the Wheel of the year calendar
https://druidry.org/druid-way/teaching-and-practice/druid-festivals/lughnasadh
5th– 14th August Zoroastrian Fravardigan / Muktad (Shenshai)
The Fravardigan festival (the festival of the fravashis), popularly known as Muktad. During sunrise on the first day of the festival the immortal souls, together with their fravashis are welcomed by name by the Zoroastrian Mobeds or Magi (priests).
https://www.spiritualarts.org.uk/fravardigan-muktad/
6th August Christian Feast of the Transfiguration
This festival commemorates the occasion when Jesus went up a mountain with three of his disciples, Peter, James and John; here, as his death approached, they saw in a vision how his face changed and his clothes became dazzling white; they witnessed him in conversation with Moses and Elijah, and heard a voice saying, ‘This is my own dear Son with whom I am pleased – listen to him’. For many Christians this account confirms the divine nature of Jesus.
https://www.reonline.org.uk/festivals-calendar/the-transfiguration
9th August Jain Raksha Bandhan
In Jain tradition, Rakshabandhan originated in the land of Hastinapur and celebrates the sacred relationship between brothers and sisters.
https://encyclopediaofjainism.com/the-festival-of-rakshabandhan-the-jain-vew/
15th August Christian (Catholic) Assumption of the Blessed Virgin Mary
The Assumption refers to the Blessed Virgin Mary being assumed — body and soul — into heaven at the end of her earthly life.
https://en.wikipedia.org/wiki/Assumption_of_Mary
26th August Muslim Birthday of the Prophet Muhummad (Milad un Nabi)
Sunni Muslims commemorate the birth anniversary of the Holy Prophet, which falls on 12 Rabi-ul-Awwal of the Islamic lunar calendar.
https://www.reonline.org.uk/festivals-calendar/the-prophet-muhammads-birthday-milad-un-nabi-12th-rabiul-awwal/
28th August Hindu Raksha Bandhan
Raksha Bandhan is an Indian celebration of sisterly and brotherly respect and love. ‘Raksha’ means protection and ‘Bandhan’, to tie.
https://www.reonline.org.uk/festivals-calendar/raksha-bandhan
With thanks to The Shap Calendar for the valuable information
https://www.shapcalendar.org.uk