No, your fast is not valid , you have to make up for this day.

Read more

One can fast three days of every month and this reward is the same of six of shawwal. Kindly refer to the following link(s): https://www.youtube.com/watch?v=QHPEgSZwMxU&t=9s

Read more

Kindly refer to the following link(s): https://www.youtube.com/watch?v=w0SiyzMnDSY

Read more