Fasting on a Saturday

Is singling out Saturday for optional fasting allowed?

A hadeeth from Tirmidhi: (gist) Do not fast on Saturday except the what is fard. It is not haraam as such, but is disliked. The context is that Saturday is an auspicious day for the Jews.

Fasting on a Friday

Is singling out Friday for optional fast permissible?

Moon Sighting

Why is there a difference in the beginning and ending of Ramadan?

I’tikaaf

Basic guidelines on spiritual retreat.

Toothpaste whilst fasting

Makrooh