The whole world counts time by this mans birth.
That's because Europe was Christian and due to some quirks of history Europe became top dog during the renaissance and colonized most of the world. It just became the standard way, although non christian countries also have their own calendars based on their revered religious figures.
English has become the lingua franca of most of the world as well. Nothing miraculous about it. Just a consequence of the British Empire and by extension the United States.
As far as your other list.
He died by crucifixion:
Many did. It was Rome.
He was buried.
You dont say...
His death caused his disciples to despair and lose hope.
Yes. People are upset when their friends are executed
The tomb was empty
Its claimed. Its also claimed that Mohammed ascended to Heaven from where the dome of the rock currently stands. The muslims also became bold proclaimers and conquered a great deal of the former christian world.