Times of Salaah

Q: If I wake up 15 minutes before fajr, can I pray tahajud or not? 

Q: In our country, fajar prayer starts at 3.50am and magrib starts 6.50pm. What is the correct time to perform tahajjud prayer?

Q: Can one read his maghrib and esha salaah in the time of maghrib before boarding the aeroplane considering that it is quite difficult for one to read his esha salaah on the aeroplane especially when there is no salaah facility on the plane?

Q: If I read tahajjud at 3 am, can I read any other nafil salaat. eg. Salaatut tasbeeh, haajat, etc. between tahajjud until fajr sets in.

Q: I am an employee in india. The maghrib time in summer (which is the season right now) starts at/after the time when my office bus starts (6:30pm) to drop the employees. Since I take the office bus and my home is approximately 2hrs, my maghrib takes place in the bus whilst being seated. There is very little khushoo with everyone staring at me and it is troubling me a lot. Is it valid for me to join my maghrib prayer with asr so that I can pray it peacefully in office before starting? If valid, can I join asr and maghrib until the sunset time changes to before 6:30pm which might take 4-5 months?

Q: What is time of zawal and when does it start and end?

Q: I completed my Fajr Salaah at 6:16 AM. The time listed for sunrise on the perpetual timetable is 6:17 AM. Was my Fajr Salaah valid?

Q: Is it permissible to combine 2 prayers? Meaning, is it permissible to pray zuhr and asr during the time for zuhr? or pray zuhr and asr during the time for asr?

Q: Our madrasah teacher once told us that we should wait for a while after Azan and pray around 10-15 mins later (i.e. she was trying to say one shouldn't immediately start praying after Azan). Is it true?

Also, my father told me that there's a Hadith that says that one should quickly pray after Azan. Is there such a Hadith?

Q: Is it permissible to pray asr salaah during the last 20 minutes between asr and maghrib? (If I didn’t deliberately delay it).