Actually they were written sooner...
Matthew
Writer: Matthew
Place Written: Palestine
Writing Completed: c. 41 C.E.
Time Covered: 2 B.C.E.–33 C.E.
Mark
Writer: Mark
Place Written: Rome
Writing Completed: c. 60–65 C.E.
Time Covered: 29–33 C.E.
Luke
Writer: Luke
Place Written: Caesarea
Writing Completed: c. 56–58 C.E.
Time Covered: 3 B.C.E.–33 C.E.
John
Writer: Apostle John
Place Written: Ephesus or near
Writing Completed: c. 98 C.E.
Time Covered: After prologue, 29–33 C.E.
Acts
Writer: Luke
Place Written: Rome
Writing Completed: c. 61 C.E.
Time Covered: 33–c. 61 C.E.
https://wol.jw.org/en/wol/d/r1/lp-e/1101990104
There was no eclipse...
a darkness: This darkness was miraculous, caused by God. It could not have been caused by a solar eclipse, which occurs at the time of the new moon. This was Passover season, so the moon was full. And the darkness lasted for three hours, far longer than the longest possible total eclipse, which lasts less than eight minutes. Here in Luke’s account, the observation that “the sunlight failed” is included.—
Lu 23:45.
https://wol.jw.org/en/wol/d/r1/lp-e/1001070667?q=eclipse&p=sen
And no, there were no walking zombies...an earthquake disturbed the graves, thus causing dead bodies to be thrown from their graves...
Matthew 27:53
people coming out: Or “they who came out.” The Greek verb indicates a plural masculine subject referring to people, not to the bodies (neuter in Greek) mentioned in
verse 52. This evidently refers to passersby, who saw the dead bodies exposed by the earthquake (
vs. 51) and who entered the city and reported what they had seen.
after his being raised up: That is, Jesus’ resurrection. The information within parentheses refers to events taking place at a later time.
they became visible: Evidently referring to the dead bodies mentioned in
verse 52.
https://wol.jw.org/en/wol/b/r1/lp-e/nwtsty/40/27#s=53&study=discover&v=40:27:51-40:27:54