Yes, the statute of limitations on trespassing is one year. However, as a low grade misdemeanor it is almost certainly NOT going to be filed or prosecuted. And after 2 months, the urgency will have been lost and this will make the odds of criminal prosecution even less likely.
If it should happen again, you can call the Sheriff's Department and demand a private person's (i.e. "citizen's") arrest. At that point, he would probably be issued a citation and you would have to go to court *IF* the DA would choose to file. Keep in mind that today in CA we are not prosecuting most theft and drug cases, so prosecuting a trespassing caper between two neighbors is not likely to see any court time.

