The 16-court-day motion clock, and what actually extends it

The three numbers, and the sentence between them

All three run backward from the hearing. The sentence excluding section 1013 sits in the middle of the same subdivision and is the most consequential line in it.

That exclusion has no separate subdivision letter. It lives inside CCP 1005(b) itself, which is worth knowing when you cite it, because there is no such thing as section 1005(b)(3).

The apparent contradiction in that subdivision is not one. Section 1005(b) first writes the mail extensions into the 16-day period in its own words, then says section 1013 does not apply. Both are true. The extensions that reach moving papers reach them because section 1005(b) puts them there, not because section 1013 operates. That is why they stop at the moving papers.

Section 1005(a) lists the motions this governs, and the list ends at subdivision (a)(13) with a catch-all: any other proceeding under the Code in which notice is required and no other time or method is prescribed. So the default is that 16, nine and five apply, and the exceptions are the motions with their own statute. Summary judgment is the obvious one, and it is not covered here.

What extends the 16, and by how much

Mail and overnight add calendar days. Electronic service adds court days. The difference matters more than the number.

Everything in that table except the last row comes out of CCP 1005(b) directly. The last row comes from CCP 1010.6(a)(3)(B), which extends "any period of notice, or any right or duty to do any act or make any response within any period or on a date certain after the service of the document" by two court days, and which applies "in the absence of a specific exception provided by any other statute or rule of court."

Electronic service is complete at transmission, and a document served electronically on a non-court day is deemed served on the next court day. CCP 1010.6. So a filing that goes out at 7 p.m. on a Friday is served Monday for computation purposes.

The unsettled part: does electronic service extend opposition and reply?

There is no published California decision on it. The two readings both start from the statutory text and end in different places.

Section 1005(b) excludes section 1013 from opposition and reply by name. It says nothing about section 1010.6. Section 1010.6 in turn says its two-court-day extension applies unless another statute or rule provides a specific exception, and it lists only new trial, section 663a, and notice of appeal. Read those two together and the extension appears to reach the nine and the five.

So this page does not tell you the answer, because there is not one to report. What it can tell you is which way to be wrong. File the opposition by the ninth court day and the reply by the fifth. If the extension exists you have lost nothing. If it does not, you are timely. The reverse bet puts your opposition in front of a judge with discretion to disregard it, and the argument you would be making is one no court has accepted yet.

Counting backward, and the days that are not there

Three statutes do the work, and the order they apply in is what people get wrong.

1. Start at the hearing date and exclude it. CCP 12c(a): where a law requires an act no later than a specified number of days before a hearing, the last day is found by counting backward from the hearing date, excluding the day of the hearing as provided by CCP 12.
2. Count only court days for the 16, the nine and the five. CCP 12a(a) defines "holiday" to mean all day on Saturdays plus the holidays specified in CCP 135. Section 135 in turn provides that "Every Saturday and the day after Thanksgiving Day are judicial holidays," so the Friday after Thanksgiving is not a court day, which is the one people miss when a December hearing gets calendared in November.
3. Then apply the service extension, backward from the date you just landed on. CCP 12c(b). The extension attaches to the deadline, not to the hearing. Adding five days to the hearing date and counting 16 back from there gives you a different, wrong answer.
4. If the last day lands on a holiday, be careful which way you move it. CCP 12 excludes a holiday falling on the last day and CCP 12a(a) extends the period to the next day that is not a holiday. Both are written for periods that run forward. Applied to a deadline counted backward from a hearing, rolling forward shortens your notice, which is the opposite of what the extension is for. See the next section, because this is the single most consequential ambiguity in counting these dates.

Why this site hands the arithmetic off

Because a date calculator that does not tell you which subdivision it used, what it did with the service extension, and when it last checked the number is doing arithmetic rather than law.

This site does not calculate dates. That is a published promise rather than a preference, and the reason is that every worked example in a paragraph goes stale the moment a holiday list or a notice period changes, while the reader keeps trusting it. The handoff goes to CalCourtDeadlines.com, which is the sister site, by the same author, free, with no ads and nothing for sale.

The part worth understanding is the disagreement it exposes, because it is the thing this page cannot resolve for you.

That is the second open question on this page, alongside whether the electronic service extension reaches opposition and reply. Neither has an answer. In both cases the safe move is the same one: land the filing earlier rather than later, because every unresolved reading costs you days rather than giving you days.

Three questions worth asking of any deadline tool, including that one.

1. Which subdivision supplies this number, and can I click through to it? "16 court days" is not a citation. CCP 1005(b) is.
2. What did you do with the service extension, and which statute did you apply? Mail and overnight run in calendar days out of CCP 1005(b) itself. Electronic service runs in court days out of CCP 1010.6(a)(3)(B). A tool that lands on the right date through the wrong statute will land on the wrong date the first time the two diverge.
3. When was this value last checked against the code? This is the one that catches people. A notice period changed by statute leaves every tool that has not been updated doing flawless arithmetic on a repealed number, and arithmetic is the part everybody checks. CalCourtDeadlines carries a verification date on each individual rule rather than one site-wide "last updated" stamp, for exactly that reason.

A tool that cannot answer all three is fine for counting days to a birthday. It is not fine for a filing deadline where being one day short is a defective motion.

Late papers, and asking for less time

The clerk cannot reject a late paper. The judge can ignore it, and has to say so in the record.

Rule 3.1300(d) does two separate things and only the second one is discretionary. The filing goes through either way. Whether it is read is the judge's call, and the ruling has to appear in the minutes or the order, which is what makes it reviewable.

Courts have used that discretion both ways. Bozzi v. Nordstrom, Inc. (2010) 186 Cal.App.4th 755 describes broad discretion to refuse papers served and filed past the deadline without a prior order finding good cause. Rancho Mirage Country Club Homeowners Assn. v. Hazelbaker (2016) 2 Cal.App.5th 252 upheld a refusal where the party made no attempt to seek leave to file late and no attempt to show good cause for missing the deadline. Going the other way, Correia v. NB Baker Electric, Inc. (2019) 32 Cal.App.5th 602 read an untimely opposition against the strong policy favouring disposition on the merits.

The distinction those cases draw is not lateness, it is whether you asked. A late opposition with an application to file late and a declaration explaining the delay is a different document from a late opposition that simply appears.

Shortening time runs the other direction and needs an order. CCP 1005(b) lets the court prescribe a shorter time, and rule 3.1300(b) says the court may do it on its own motion or on application supported by a declaration showing good cause.

In practice the discretion runs more forgiving than the case law makes it sound.

Courts will usually accept a late paper where the delay is reasonable or the neglect is the ordinary human kind. What decides it is almost never the length of the delay. It is whether you filed something with the late paper. A short declaration explaining what happened, or an application for leave to file late, gives the court the thing it needs in order to say yes. The paper that arrives on its own, with no explanation and no request, is the one that gets disregarded, and the minute order will say so.

Going in ex parte to ask for relief does not hurt either. It costs a morning, and it puts you in front of the judge explaining yourself, which is a better posture than having the tentative explain it for you.

The rule underneath all of it is simpler than the statute. File what you can when you can. A partial opposition filed on time is worth more than a complete one filed late, and an incomplete filing with a declaration attached is worth more than a perfect filing nobody reads.

The local layer

The numbers above are statutory and do not vary by county. What varies is everything wrapped around them: how a hearing date is reserved, whether the department requires a courtesy copy and by when, whether tentatives issue the court day before, and how a given judge treats a late paper.

San Diego, Riverside and San Bernardino are the counties this site speaks to. For every other county, the statute is the answer and the department's standing order is the next thing to read, including in Los Angeles and Orange, where a confident wrong sentence about a department's practice would be worse than no sentence.