“And it came to passe, in the moneth Nisan, in the twentieth yeere of Artaxerxes the king, that wine was before him: and I tooke vp the wine, and gaue it vnto the King: now I had not bene beforetime sad in his presence.”
1611 King James Version (KJV)
2:1 Nisan - Four months after he had heard those sad tidings. The reason of this long delay might be either that his turn of attending upon the king did not come 'till that time: or that 'till then he wanted a fit opportunity to move it to him.