According to the theory of relativity, time dilation occurs when an object is moving relative to an observer. As an object's speed approaches the speed of light, time slows down for that object relative to a stationary observer. However, the speed of light itself remains constant in all frames of reference.
The speed of light in a vacuum is approximately 299,792,458 meters per second (or about 186,282 miles per second). This value is considered to be a fundamental constant of nature and is denoted by the symbol "c." It does not change regardless of the observer's frame of reference or the relative motion of objects.
So, even if an object were traveling at a significant fraction of the speed of light and experiencing time dilation, the speed of light would still be measured as the same constant value, regardless of the observer's perspective.