If a prayer is missed, it is customary practice among Muslims to make it up as soon as they recall or are able to. This is referred to as Qadaa. For example, if one misses the midday prayer due to an unavoidable work meeting, one should pray as soon as the meeting is completed.
It's also acceptable to pray at any time during Fajr (dawn prayer), Zuhr (noon prayer), and Asr (afternoon prayer) as long as you do not delay others. However, if you go too far into the night without praying, then that would be considered sinning against God.
The important thing is that you try to pray as soon as you can. Whether it's early in the morning or late at night, just get up and pray whenever you can.
Prayer is one of the five pillars of Islam. Without a doubt, Allah (God) loves those who love him back. That's why he commanded us to pray and gave us many blessings for our prayers.
There are many schools of thought on the precise salah timings, with small differences. Every school of thought agrees that a prayer cannot be done before its appointed hour. This means that you cannot pray before the morning prayer or before sunset.
The most common opinion is that you can pray at any time before the next prayer opportunity comes around. In other words, you can pray multiple prayers in between main meals, as long as they are not consecutive.
This view was laid out by the Prophet (peace_be_upon_him) in a hadeeth where he said: "Allah will not punish a man for an act he has done before him but will forgive him for it." [At-Tirmidhi]
It is important to understand that praying before the time prescribed is mandatory and should not be done as a matter of convenience. If you have to choose whether to pray later or not at all, we recommend that you take advantage of each moment's opportunity because life is short and there will be others who don't have this chance.
Praying after the time prescribed is also recommended by many scholars. They say that if you can manage to wait until then, great, but if you cannot, then this does not hurt anything.
It is a sin for a Muslim to purposefully miss a prayer. The penalty for missing a prayer is the same as for lying: excommunication from Islam.
The reason that missing a prayer is considered the same as lying is because the act of praying is not only important, but it is essential. If you do not pray, you are essentially saying that Islam is unnecessary and that you could get by without doing anything else. This is why missing prayers is considered so serious an offense; if you do it once, you have ruined your chance of being forgiven later on.
It is possible to miss prayers for many reasons. Maybe you are sick and cannot make it to the mosque, or perhaps there is some other important matter that comes up and you need to leave early. However, even if you amass enough excuses, they will never be good enough to justify intentionally skipping prayers. A person who does this has made himself/herself unworthy of being prayed for. And since everyone is entitled to Islamic forgiveness, it is extremely unlikely that anyone will complain about you failing to pray on several occasions.
In conclusion, it is forbidden for a Muslim to purposely miss prayers.