Space is real, because if space is not real, we can't live. Our body, as a three-dimensional creature, is a three-dimensional space that lives in three-dimensional space, including low-dimensional space, that is, two-dimensional space and one-dimensional space. We can simply understand the world in which ants live as a one-dimensional space, because it has no concept of up and down, only exists around, and space exists, but the space we understand now is only a part of space.
Time is a situation that human beings perceive. No matter whether our existing legislation is the Gregorian calendar now in use or the Mayan people discovered before, 20 days a month, and then 18 months plus five public holidays a year, such legislation is artificially specified and exists objectively. Whether you score 365 or 36.5, it still exists. It's just that the time we perceive now is still a part of time, because our spatial dimension is too low, and only a higher dimensional space can recognize a more comprehensive time, because we need to know more laws to grasp the laws of nature more clearly.
We are three-dimensional creatures. Theoretically, it is impossible for us to enter high-dimensional space, because we don't know anything about the laws of that world. However, whether we can enter a higher dimensional space or not, time and space are a reality we perceive and should exist, but what we perceive is a partial existence, not a complete form.