According to our current understanding of physics, photons do not accelerate from rest and do not experience time as we know it. Photons are elementary particles that travel at the speed of light in a vacuum, approximately 299,792,458 meters per second. When a photon is emitted, it travels at this speed from the moment of its creation. There is no concept of "time" for a photon in the usual sense, as time effectively stands still for particles moving at the speed of light due to time dilation.
In classical physics, when an object with mass accelerates, its speed changes, and it takes time to reach its final velocity. However, for massless particles like photons, this does not apply. According to Einstein's theory of special relativity, as an object with mass approaches the speed of light, its mass becomes infinitely large, and it would require an infinite amount of energy to accelerate it further. Since photons have no rest mass, they can travel at the speed of light in a vacuum without any acceleration.
In summary, photons do not experience acceleration as objects with mass do. When they are emitted, they instantaneously travel at the speed of light in a vacuum without going through a process of acceleration.