All The Scientific Terms where TIME is used
Such as Speed , Flow of Water or Gas , Units of Medicines or Amount of Rainfall or Energy Consumption (KWH) are All Based on Some
Human Perception OR an Objective Reality
WITH a TIME LAG
That is when we are travelling at some speed we would be home in an Hour or so
OR After Taking Medicine for 3 DAYS
Your Flu infection will be cured OR
When You are Going to be Eligible to
Get a Driving Licence in a Few Months
OR When Energy Consumption increases in Summers due to usage of Air Conditioning
So the Mind can Co-Relate Time with a Present and Future Situation
Hence To say that Time is An ILLUSION is to convert all Humans into Robots and Zombies
When you try to understand the universe and how it operates, you will have to think outside the constraints humans have. Fundamentally we are not equipped enough to understand the nature of the universe just like a worm without eyes cannot understand concept of light. In the world of physics, time may not exist, just because illusion of time exist in our consciousness.
In your daily life, you may get an illusion that something have "top" or "bottom". It may become an essential reality for you and 6 billion others, but that doesn't mean that"top" or "bottom" exist for that object in the world of physics when you look at it from outside the constraints of a human.
Saying that time can be an illution is as confusing as saying "top of the earth is not sky". It may be confusing, but not necessary wrong.