The Aviator game is based on a Random Number Generator (RNG), which means that the outcome of each round is determined by a complex algorithm that produces random and fair results.
Therefore, there is no “best time” to play the game where you would have better odds of winning. The outcomes are not influenced by the time of day or the number of players online.
The best time to play is purely subjective and should be based on when you find it most enjoyable and when you can afford to spend time and money on entertainment without affecting your daily responsibilities.