For background information. In general, all sacrifices that were sacrificed by accident for something they were not intended for are valid, but are not attributed to the owner in a way that absolves them from their obligation. However, the law for a Passover sacrifice is that on all days of the years besides the day before Passover is a peace offering. But the day before Passover, if he slaughters it for something besides a Passover sacrifice, then that sacrifice is not valid. Furthermore the law in general is that if one slaughterers a sacrifice for the wrong sacrifice or the wrong person, it is valid, but it is not attributed to the owner as a fulfilment of their obligation , rather it is considered as a voluntary present. I would like to ask if one slaughters a Passover sacrifice on any other day of the year besides the day before Passover, how should he proceed? Should he keep on doing the next services ((walking, sprinkling the blood, burning the sacrifice on the altar)) for the sake of a Passover sacrifice, or should he do the next services for the sake of a peace offering? On one hand, you can say he must continue doing the remain services as if it is a Passover because that is how he vowed. But on the other hand, the law is that a Passover sacrifice on all the other days of the years is a peace offering. Therefore, he should continue its remaining services for the sake of a peace offering. And, in fact, it is hard to say that he should continue doing the remaining services for the sake of a Passover, since by doing so he is consciously doing something wrong. He is continuing the sacrifice of a peace offering, and therefore that is what he should intend. --------------------------------For background information. In general, all sacrifices that were sacrificed by accident for something they were not intended for are valid, but are not attributed to the owner in a way that absolves them from their obligation. However, the law for a Passover sacrifice is that on all days of the years besides the day before Passover is a peace offering. But the day before Passover, if he slaughters it for something besides a Passover sacrifice, then that sacrifice is not valid. Furthermore the law in general is that if one slaughterers a sacrifice for the wrong sacrifice or the wrong person, it is valid, but it is not attributed to the owner as a fulfilment of their obligation , rather it is considered as a voluntary present. I would like to ask if one slaughters a Passover sacrifice on any other day of the year besides the day before Passover, how should he proceed? Should he keep on doing the next services ((walking, sprinkling the blood, burning the sacrifice on the altar)) for the sake of a Passover sacrifice, or should he do the next services for the sake of a peace offering? On one hand, you can say he must continue doing the remain services as if it is a Passover because that is how he vowed. But on the other hand, the law is that a Passover sacrifice on all the other days of the years is a peace offering. Therefore, he should continue its remaining services for the sake of a peace offering. And, in fact, it is hard to say that he should continue doing the remaining services for the sake of a Passover, since by doing so he is consciously doing something wrong. He is continuing the sacrifice of a peace offering, and therefore that is what he should intend.