In our current understanding of physics, light itself does not "travel through time" in the sense of moving backwards in time. Rather, light travels at the speed of light, which is constant and is denoted as "c" in the theory of relativity.
According to Einstein's theory of special relativity, as an object with mass accelerates and approaches the speed of light, time dilation occurs. This means that time appears to pass more slowly for the moving object relative to a stationary observer. However, this time dilation effect does not imply that the moving object is traveling through time in a different direction.
For light, which travels at the speed of light itself, time does not pass from its own perspective. According to an observer traveling at the speed of light, time would appear to stand still. This concept is derived from the relativistic equations of time dilation and the behavior of massless particles like photons.
It's important to note that when we observe light from distant objects, there can be a time delay between the emission of the light and its arrival at our location. This is due to the finite speed of light and the vast distances involved in the universe. However, this time delay is not related to light itself "traveling through time" in any unconventional manner.
In summary, light does not travel through time in a different manner than other objects. It follows the laws of physics, including time dilation effects at high speeds, but it does not move backwards in time.