'Year of' in the Bible

In the fifth [day] of the month, which was the fifth year of king Jehoiachin's captivity,

And it came to pass in the twelfth year of our captivity, in the tenth [month], in the fifth [day] of the month, that [a man] who had escaped out of Jerusalem came to me, saying, The city is smitten.

In the twenty-fifth year of our captivity, in the beginning of the year, in the tenth [day] of the month, in the fourteenth year after the city was smitten, in the selfsame day, the hand of LORD was upon me, and he brought me there

But if he gives a gift of his inheritance to one of his servants, it shall be his to the year of liberty, then it shall return to the ruler. But as for his inheritance, it shall be for his sons.