Pick a deadline and enter the trigger date. The result applies Cal. Code Civ. Proc. 12, 12a, 10; Gov. Code 6800, 6804, 6806; Cal. Rules of Court, rule 1.10 (for periods set by the Rules of Court) (counting, weekends and court holidays), service-method extensions where the law allows them, and the rule for that deadline, with each step and citation shown. Scope: Contra Costa County local rules are included below (marked with the court name), layered on these base rules. California special proceedings: eminent domain (CCP 1245.235-1268.720), election contests and recounts (Elec. Code 15620-16940), Lanterman-Petris-Short involuntary treatment and LPS conservatorship (Welf. & Inst. Code 5250-5365), elder and dependent adult abuse restraining orders (Welf. & Inst. Code 15657.03; Cal. Rules of Court, rule 3.1160), traffic trial by written declaration (Veh. Code 40902; Cal. Rules of Court, rule 4.210), and infraction appeals to the appellate division (Cal. Rules of Court, rules 8.900-8.929). The general 30-day answer period in eminent domain (CCP 412.20 via CCP 1230.040, 1250.120) and general civil appeal timing are covered in the CA civil and CA appellate sets and are not duplicated. Probate Code conservatorships are in the CA probate sets.. Rules current as of 2026-10-27.
Contra Costa County local rules independently reviewed (effective 2026-07-01)
Deadline
Monday, November 23, 2026
Trigger (Date the governing body mailed the notice of intent to adopt a resolution of necessity): Friday, November 6, 2026.
Exclude the trigger day and count 15 calendar days: Saturday, November 21, 2026.
That day is a Saturday, so the deadline moves to the next court day: Monday, November 23, 2026 (Cal. Code Civ. Proc. 12, 12a, 10; Gov. Code 6800, 6804, 6806; Cal. Rules of Court, rule 1.10 (for periods set by the Rules of Court)).
Rules applied
Cal. Code Civ. Proc. 1245.235(b)(3)
(b) The notice required by subdivision (a) shall be sent by first-class mail to each person described in subdivision (a) and shall state all of the following: ... (3) Failure to file a written request to appear and be heard within 15 days after the notice was mailed will result in waiver of the right to appear and be heard.
Official sourceCal. Code Civ. Proc. 12, 12a, 10; Gov. Code 6800, 6804, 6806; Cal. Rules of Court, rule 1.10 (for periods set by the Rules of Court)
CCP 12: "The time in which any act provided by law is to be done is computed by excluding the first day, and including the last, unless the last day is a holiday, and then it is also excluded." CCP 12a: "(a) If the last day for the performance of any act provided or required by law to be performed within a specified period of time is a holiday, then that period is hereby extended to and including the next day that is not a holiday. For purposes of this section, “holiday” means all day on Saturdays, all holidays specified in Section 135 and, to the extent provided in Section 12b, all days that by terms of Section 12b are required to be considered as holidays.(b) This section applies to Sections 659, 659a, and 921, and to all other provisions of law providing or requiring an act to be performed on a particular day or within a specified period of time, whether expressed in this or any other code or statute, ordinance, rule, or regulation." CCP 10: "Holidays within the meaning of this code are every Sunday and any other days that are specified or provided for as judicial holidays in Section 135." Gov. Code 6800: "The time in which any act provided by law is to be done is computed by excluding the first day, and including the last, unless the last day is a holiday, and then it is also excluded." Gov. Code 6804: "“Month” means a calendar month, unless otherwise expressed." Gov. Code 6806: "A day is the period of time between any midnight and the midnight following." CRC 1.10(a): "The time in which any act provided by these rules is to be performed is computed by excluding the first day and including the last, unless the last day is a Saturday, Sunday, or other legal holiday, and then it is also excluded." CRC 1.10(b): "Unless otherwise provided by law, if the last day for the performance of any act that is required by these rules to be performed within a specific period of time falls on a Saturday, Sunday, or other legal holiday, the period is extended to and includes the next day that is not a holiday." Elec. Code 15: "Notwithstanding any other provision of law, if the last day for the performance of any act provided for or required by this code shall be a holiday, as defined in Chapter 7 (commencing with Section 6700) of Division 7 of Title 1 of the Government Code, the act may be performed upon the next business day with the same effect as if it had been performed upon the day appointed.For purposes of this section, the Friday in November immediately after Thanksgiving Day shall be considered a holiday."
Pre-suit administrative deadline; the request is filed with the public entity, not the court. The period runs from mailing, so no CCP 1013 mail extension is added (extensions 'none'). Roll under CCP 12a is applied by default, but the entity's office closures (CCP 12b) govern and may differ from court holidays; file by the unrolled day if possible. Under 1245.235(d) the entity may use another procedure giving 'reasonable written personal notice'; the notice actually sent controls. Section last amended Stats. 1986, ch. 358.
If the clerk's office is closed or inaccessible on the last day (weather, emergency or local closure orders), the deadline may be extended. Check local orders.
This calculator applies the cited rules to the dates you enter. It is not legal advice. Court orders, local rules, and case-specific facts can change a deadline; verify before relying on it. Rule set pending attorney review.
Track a case. Save its key dates once, get every deadline in one calendar feed for Outlook, Google or Apple, and it updates itself when the trial is continued or a rule changes.
Contra Costa County: other local timing requirements
Fee-waiver litigant: request for court-provided reporter for unlimited civil law and motion hearings by 4:00 p.m. the court day before (email, fax, or phone); none provided where tentative ruling is uncontested. Contra Costa Super. Ct. Local Rule 2.53(a)(2)
Civil tentative rulings available from 1:30 p.m. the court day before the hearing; request argument by 4:00 p.m. that day and notify all other parties by 4:00 p.m. Contra Costa Super. Ct. Local Rule 3.43
Civil Fast Track ex parte: OST applications must be accompanied by proposed moving papers; ex parte heard at times designated by each judge (see court website). Contra Costa Super. Ct. Local Rule 3.46
Civil ex parte (unlimited and limited civil, unlimited UD; not family, probate, limited UD or restraining orders): notice to parties by 10:00 a.m. the day before; email notice to the department by 10:00 a.m. the court day before; papers served and submitted by 3:00 p.m. the day before; opposition by 10:00 a.m. the day of the ex parte determination; matters decided on the papers unless a hearing is ordered. Contra Costa Super. Ct. Standing Order 3.5, part I
Criminal motions: a filed motion may be dropped up to 48 hours before the appearance date on notice to opposing counsel and the court; within 48 hours the moving party must appear. Contra Costa Super. Ct. Local Rule 4.1(d)(2)
Complex cases only (Contra Costa Dept. 16): at first appearance for trial lodge stipulations, uncontested MILs, joint statement of the case, Master Exhibit List and three exhibit binders/thumb drives, expert designation binder, Proposed Trial Schedule, Other Persons List, and jury instructions/verdict forms; each side names next court day's witnesses by the end of each court day. Contra Costa Super. Ct. Dept. 16 Pre-Trial Orders (rev. 2025), paras. 8, 10, 13, 24
Complex/mass tort: Complex Litigation Department 16 (Judge Benjamin Reyes II): Department 16 Pre Trial Orders, Initial Case Assignment Order, sample issue conference and trial orders Complex cases heard in Dept. 16; department pretrial standing order and initial case assignment order set case schedules (documents not parsed). Local Rule 3.16 (Complex Litigation Cases) exists but its text could not be retrieved. Source
Complex/mass tort: Complex Civil Litigation Department (Local Rule 3.16) Cases covered by CRC 3.400 assigned to designated Complex Civil Litigation Department; subject to procedures on court's Complex Litigation web page and Electronic Case Filing Standing Order. No fixed day-count schedule in rule. Source
Under Cal. Rules of Court, rule 3.20, county rules cannot change statewide deadlines for pleadings, motions, discovery or ex parte applications; local rules that tried to were excluded from the calculator.