Ramadan is a lunar month so its start and end are confirmed by the sighting of the new moon. It requires two acceptable Muslims testifying to the fact, but if no one sees it; Muslims must complete the precedent month.
What is more important than fasting is forming the intention. Muslims are obliged to form the intention and it must be formed before dawn. If the fasting is voluntary it is acceptable to form it during the day.
When the intention should be formed.
Confirmation of the start of Ramadan.
Does inhaling steam nullify your fast? - Assim al hakeem.
Can we raise our hands to make dua before iftar (before breaking the fast)? - Assim al hakeem.
Ruling on Fasting in Polar Areas.
Can we have the intention to fast and to lose weight at the same time (Ramadan)?
Can I give Fidya (unable to fast) at end of Ramadan or feed each day? What about feeding in advance?
Invited to an Iftar Party, should the male guests go to the masjid or pray there? - Assim al hakeem.
Are those who have Gastro or Diabetes exempted from fasting in Ramadan? - Assim al hakeem.
Best time to make dua in Ramadan and outside Ramadan - Assim al hakeem.
What is the minimum & maximum age a child should start fasting? - Assim al hakeem.
Siren for breaking fast, is it from sunnah? Break fast upon hearing Siren or at Maghrib time?
How to witness Laylatul Qadr? - Assim al hakeem
Can we combine the 6 days of shawwal with the missed fasts of Ramadan? - Assim al hakeem.
All about fasting the 6 days of Shawwal - Assim al hakeem.
Completing Quran in Ramadan, Continue from where I left off or Start from beginning? Assim al hakeem
Is there any dua to recite in suhoor before the fast? - Assim al hakeem.
I have anxiety & depression, can I not pray and fast? - Assim al hakeem.