Yes time dilation itself is a phenomena and it happens due curving or stretching of time fabric according to special relativity time is not constant for everyone. It's treated as fabric and a dimension for instance image you are 4th dimensional being so the time may appear like mountain to you which you can slide down to past or climb to future for example imagine you have a brother and you both are twin 10year old and I made a spaceship that can travel with speed of light and made your brother sit in that and made him rotate the earth for 10 years and when he comes back he will still be 10 year old while you will be 20 years old
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Yes time dilation itself is a phenomena and it happens due curving or stretching of time fabric according to special relativity time is not constant for everyone. It's treated as fabric and a dimension for instance image you are 4th dimensional being so the time may appear like mountain to you which you can slide down to past or climb to future for example imagine you have a brother and you both are twin 10year old and I made a spaceship that can travel with speed of light and made your brother sit in that and made him rotate the earth for 10 years and when he comes back he will still be 10 year old while you will be 20 years old