WOW! That is a really loaded question! I'm not sure if your reference to 'time' is about the time of year, or time of life.
The time of year doesn't really matter if it is an indoor wedding.
The time of life. Now that matters. Knowing who you are, your values and the things that are deal breakers are important.
Marriage isn't for the weak and it isn't for the short haul. The best time to get married is when you are both ready.