48 Nedarim 8/3-5

(3) "Until the grain harvest," "until the wine vintage," "until the olive harvest," he is only forbidden until it reaches [these harvests]. This is the rule: Anything that has a set time and he says, "until it reaches that time," he is forbidden until that time. If he says, "until it will be," he is forbidden until it passes. And anything that does not have a set time, whether he says "until it will be" or whether he says "until it reaches," he is only forbidden until it arrives.

(4) "Until the summer," "until it will be the summer," until the people start to gather [figs] into baskets. "Until the summer passes," until the mats [used for drying figs] are folded up. "Until the grain harvest," until the nation begins to harvest wheat but not to harvest barley. All goes according to the place of his vow, if he was in a mountain, by [the harvest of] a mountain, if he was in a valley, by the valley.

(5) "Until the rains," "until there has been rain," until the second rain falls. Rabbi Shimon ben Gamliel says, until it reaches the time of the second rain. "Until the rain stops," until all of Nissan passes, these are the words of Rabbi Meir. Rabbi Yehudah says, until Passover passes. "Konam, wine that I will not taste this year;" if they add on to the year, he is forbidden during the year and the extension. "Until the beginning of Adar," until the beginning of Adar I. "Until the end of Adar," until the end of Adar I. Rabbi Yehudah says, "Konam, wine that I will not taste until it will be Passover," he only forbidden until the night of Passover, because he only intended until the time that it is the way of men to drink wine.