In the book of Daniel we find this about the Antichrist:
He shall speak pompous words against the Most High,
Shall persecute the saints of the Most High,
And shall intend to change times and law.
Then the saints shall be given into his hand
For a time and times and half a time. Dan.7:25
Here Daniel 7 is talking specifically about the Antichrist doing this changes right before he takes power for 3 ½ years. (Rev.13:5).