'Years' in the Bible

Then after three years I went up to Jerusalem to visit Peter, and stayed with him fifteen days.

Then after a period of fourteen years I went up again to Jerusalem with Barnabas, taking Titus also with me.

Now I say this. A covenant confirmed beforehand by God in Christ, the law, which came four hundred thirty years after, does not annul, so as to make the promise of no effect.

You observe days, months, seasons, and years.