📅 Deadline Calculator — Calculate Legal & Court Filing Deadlines

Calculate due dates & count down to deadlines — calendar, business & court days

✓ Business & Calendar Days ✓ US Federal Holidays ✓ Multi-Deadline Tracker

Calculate Your Deadline

Start Date

Number of Days

days

Direction

Day Type

Label (optional)

Exclude US Federal Holidays

Include start date in count (Day 1 = start date)

✎ Tip: Court Days follows FRCP Rule 6(a) — skips weekends & all 11 federal holidays, and rolls forward if deadline lands on a weekend or holiday. For state courts verify local rules.

Deadline Date

—

Days Left

—

Weeks

—

Months

—

Business Days

📊 Deadline Breakdown

Label—

Start Date—

Days Counted—

Day Type—

Deadline Date—

Day of Week—

Calendar Days From Today—

⚠ For reference only. Always verify legal deadlines with your court or attorney.

Add Multiple Deadlines — Track All at Once

Name

Due Date

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Deadline Calculator · Legal Filing Dates · calculatorzhub.com

For reference only · Always verify legal deadlines

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Working Days Calculator: Count business days between two dates, excluding US federal holidays
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Day Counter: Count all calendar days between any two dates
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Our free deadline calculator finds the exact due date from any start date — in calendar days, business days, or court days — with all 11 US federal holidays automatically excluded. Attorneys, paralegals, legal secretaries, and pro se litigants use it to calculate court deadlines, answer deadlines, discovery response dates, appeal windows, and filing dates without counting manually. Enter your start date, number of days, and day type and get the exact deadline in one click.

Unlike most online deadline calculators that offer only basic date addition with no legal rules, no holiday exclusions, and no multi-deadline management, this legal deadline calculator handles all three day-counting methods — calendar days, business days, and court days under FRCP Rule 6(a) — with all 11 US federal holidays automatically excluded. The Multi-Deadline Tracker sorts all your upcoming filings by urgency, and Tab 3 covers FRCP rules, Texas TRCP, California CCP, and Florida deadline rules with the full 2025–2026 federal holiday calendar.

How to Calculate Court Deadlines

Every legal professional knows that calculating deadlines incorrectly can mean a missed filing, a default judgment, waived appellate rights, or a legal malpractice claim. The three-step process for any court deadline is: identify the triggering event, apply the correct day count from the applicable rule, and use the right day-counting method (calendar, business, or court days). The deadline calculator above handles all three steps automatically.

Three day-counting methods — choose the right one for your rule:
Calendar Days — count every day including weekends and holidays
Business Days — skip Saturday, Sunday, and all federal holidays
Court Days (FRCP 6(a)) — skip weekends + holidays; if last day falls on weekend/holiday → next business day

Critical FRCP Rule 6(a) — Two-Tier System:
For periods under 11 days, intermediate Saturdays, Sundays, and federal holidays are excluded from the count. For periods of 11 days or more, every calendar day counts unless the rule explicitly says “court days” or “business days.” Always verify which type your rule requires before calculating. The Day 1 rule applies universally — the triggering event date is not counted; Day 1 is the following day.

Legal Deadline Calculator — Calendar vs. Business vs. Court Days

Method	Weekends	Holidays	When to Use
Calendar Days	Counted	Counted	Statutes of limitations, 1031 exchange (45/180 days), SEC filings, contract deadlines, PCT national phase
Business Days	Excluded	Excluded	IRS deadlines, Medicare enrollment, HUD first legal deadlines, lien deadlines, SPA deadlines
Court Days (FRCP 6(a))	Excluded	Excluded	Federal court answer deadlines, discovery responses, motions, appeal windows, pretrial deadlines

When using any court deadline calculator, also account for service method. Under FRCP Rule 6(d) — the “+3 days mail rule” — when a paper is served by mail, 3 additional calendar days are added to the response period. For example, 30-day interrogatory responses become 33 days when discovery is served by mail. This rule does NOT apply to ECF (electronic filing) service, which is treated as immediate.

Federal Court Deadline Calculator — FRCP Rule 6(a) in Detail

The Federal Rules of Civil Procedure Rule 6(a) is the foundation of every federal court deadline calculator. It governs time computation in all US district courts, bankruptcy courts, and federal appellate courts. Key provisions:

Day 0 = triggering event. Counting begins the next day (Day 1).
Under 11 days: Skip intermediate Saturdays, Sundays, and federal legal holidays.
11 days or more: Count all calendar days; weekends and holidays are included.
Last-day rule: If the final day falls on a Saturday, Sunday, or federal holiday, the deadline rolls to the next business day.
FRCP 6(d) mail rule: Add 3 days when service is by mail or certain electronic means outside ECF.

Federal Filing Type	Days	Authority
Answer to Complaint	21 days after service	FRCP Rule 12(a)(1)
Answer (waiver of service)	60 days after request sent	FRCP Rule 4(d)(3)
Response to Amended Complaint	14 days after service	FRCP Rule 15(a)(3)
Discovery Responses (interrogatories / requests)	30 days after service	FRCP Rules 33, 34
Deposition Notice	14 days before deposition	FRCP Rule 30(b)(1)
Motion to Reconsider	28 days after judgment	FRCP Rule 59(b)
Notice of Appeal (civil)	30 days after judgment	FRAP Rule 4(a)(1)(A)
Notice of Appeal (US/agency party)	60 days after judgment	FRAP Rule 4(a)(1)(B)

Texas Deadline Calculator — Answer, Discovery & Pretrial Deadlines

The Texas answer deadline calculator is the most frequently searched legal deadline in the country, and for good reason: the Texas answer deadline rule is different from all other states. Under Texas Rules of Civil Procedure (TRCP) Rule 99, a defendant must file an answer by 10:00 a.m. on the Monday next after the expiration of 20 days from the date of service — not simply “20 days.”

Texas Answer Deadline — Worked Example: Served Wednesday, June 4, 2025. Count 20 days forward = Monday, June 24. That date is already a Monday, so the answer is due Monday, June 24, 2025 at 10:00 a.m. If the 20th day falls mid-week, move forward to the next Monday. Use the deadline calculator above: enter service date, select 20 court days forward.

Texas Answer Deadline (TRCP 99): Monday after 20 days from service
Texas Discovery Responses (TRCP 196, 197): 30 days after service of requests
Texas Pretrial Deadlines: Governed by O’Connor’s Texas Pretrial Deadlines system — count backward from trial date
Texas Notice of Appeal: 30 days from judgment signed (90 days if motion for new trial filed)
Texas MSJ Response: 7 days before hearing (TRCP Rule 166a)

Texas state courts observe additional holidays beyond the 11 federal holidays. Verify the Texas state court holiday calendar at the Texas Office of Court Administration before finalizing any Texas legal deadline calculator result.

California Legal Deadline Calculator — CCP Rules

The California court deadline calculator must account for California’s unique mail-service extension rules under the California Code of Civil Procedure (CCP). The standard response period to a complaint is 30 calendar days from service, but this extends significantly depending on how service was made:

Personal service in California: 30 calendar days
Mail service within California (+5 days, CCP 1013(a)): 35 calendar days
Mail service outside California (+10 days, CCP 1013(a)): 40 calendar days
Unlawful detainer (eviction): Only 5 business days — far shorter than standard civil
MSJ (Motion for Summary Judgment) — California: Motion filed at least 75 days before hearing; opposition due 14 days before hearing; reply due 5 days before (CCP 437c)

For the California legal date calculator (LASC), Los Angeles Superior Court also follows specific local rules. The California MSJ deadline calculator is especially complex — always verify current CCP provisions and your specific court’s local rules. For mail-service extensions, enter the adjusted day count (e.g., 35 instead of 30) in the deadline calculator above.

Florida Legal Deadline Calculator

Florida courts follow the Florida Rules of Civil Procedure. Standard deadlines and service extensions for the Florida deadline calculator:

Response to complaint: 20 calendar days from service of process
Mail service (+5 days, FRCP 1.090(e)): 25 calendar days when served by mail
Notice of Appeal: 30 days from rendition of the order
Motion to Intervene: Within the time allowed for pleading

Florida also observes several state-specific legal holidays beyond the federal calendar. The Florida legal due date calculator results should always be verified against the Florida Statewide Uniform Case Management Standards and your county court’s local holiday schedule at flcourts.gov.

Specialty Deadline Calculators

1031 Exchange Deadline Calculator

A 1031 exchange under IRC Section 1031 has two hard calendar-day deadlines running from the closing date of the relinquished property:

45 calendar days — to identify replacement property (identification deadline)
180 calendar days — to close on replacement property (exchange deadline)

Both are strict calendar days — weekends and holidays are NOT excluded and there are no extensions. Missing the 45-day identification deadline or the 180-day exchange deadline disqualifies the entire exchange and triggers full capital gains tax liability. In the deadline calculator above, select “Calendar Days” and turn off “Exclude Holidays.”

PCT National Phase Deadline Calculator

A PCT (Patent Cooperation Treaty) national phase deadline is typically 30 months from the earliest priority date. This is a strict calendar day count with no weekend or holiday exclusions. Missing this deadline permanently bars entry into the national phase in that jurisdiction without a special petition. Enter your earliest priority date, select approximately 913 days (30 months) in calendar day mode.

Legal Deadline Calculator — Discovery Served by Mail

Under FRCP Rule 6(d), service by mail adds 3 calendar days to any response period. This applies to discovery requests, motions, and other papers served by first-class mail. It does not apply to ECF electronic service or hand delivery. For the legal deadline calculator with discovery served by mail: if interrogatory responses are normally due in 30 days, enter 33 days when served by mail.

SEC Filing Deadline Calculator

SEC filing deadlines are calendar day deadlines that do not exclude weekends but do roll to the next business day when the deadline falls on a Saturday, Sunday, or federal holiday. For 10-K annual reports, the deadline is 60, 75, or 90 calendar days after fiscal year end depending on company filer category. Use the deadline calculator in calendar day mode.

How to Calculate Deadlines in Excel

For teams who prefer spreadsheet-based deadline tracking, here are the key Excel formulas for calculating deadlines:

Excel formulas for deadline calculation:
=A1 + 30                Add 30 calendar days to date in A1
=WORKDAY(A1, 30)     Skip weekends only (no holidays)
=WORKDAY(A1,30,holidays) Skip weekends + named holiday range
=A1-TODAY()            Days remaining until deadline in A1
=NETWORKDAYS(TODAY(),A1,holidays) Business days left until A1

Excel’s WORKDAY function skips weekends only by default. To exclude federal holidays, create a named range called “Holidays” containing all holiday dates and pass it as the third argument. The legal deadline calculator Excel limitation: Excel cannot replicate the FRCP Rule 6(a) under-11-day distinction or the last-day roll-forward rule automatically — use the Deadline Calculator above for legally significant deadlines.

Deadline Calculator — Frequently Asked Questions

Identify the triggering event (service date, judgment date, or event date). Day 1 is the day after the triggering event — the event date itself is not counted. Count forward the required number of days using the correct method for your rule — calendar days, business days, or court days per FRCP Rule 6(a). If the final day falls on a Saturday, Sunday, or federal holiday, it moves to the next business day. The Deadline Calculator above automates all of this with one click.

Under TRCP Rule 99, count 20 days from the service date and find the next Monday on or after that date. That Monday at 10:00 a.m. is your answer deadline. If you are served on Wednesday, June 4: 20 days later = Monday, June 24 — answer due June 24. If you are served on Thursday, June 5: 20 days later = Tuesday, June 25 — move to the next Monday, June 30. Enter your service date in the Texas answer deadline calculator above and select 20 court days forward.

Calendar days count every day including weekends and holidays. Court days (FRCP Rule 6(a)) skip Saturdays, Sundays, and all 11 US federal holidays. A 30-day period using court days takes longer than 30 calendar days because weekends and holidays are excluded. Always check your applicable rule to determine which method applies. Many statutes of limitations use calendar days while most procedural response deadlines use court days.

Under FRCP Rule 6(a) and most state court rules, if a deadline falls on a Saturday, Sunday, or federal holiday, it automatically extends to the next business day. If Christmas Day (December 25) is your deadline and falls on a Thursday, your filing is due Friday, December 26 — or the next business day if December 26 is also a court holiday. This extension is automatic; you do not need to file a motion to extend.

A 1031 exchange has two hard deadlines from closing: 45 calendar days to identify replacement property and 180 calendar days to close. Both are strict calendar days — no weekends or holidays are excluded, and there are no extensions available. Enter your closing date in the deadline calculator, select “Calendar Days,” and turn off “Exclude Holidays” to get both deadlines accurately.

FRCP Rule 6(d) adds 3 calendar days to any response period when service is made by mail. If interrogatories are served by first-class mail and responses are normally due in 30 days, the actual deadline is 33 days from the mailing date. This rule does not apply to ECF electronic service. For California, CCP Section 1013(a) adds 5 days for in-state mail service and 10 days for out-of-state mail service — a longer extension than federal rules.

Florida response deadlines are generally 20 calendar days from service of process under the Florida Rules of Civil Procedure. For mail service, add 5 days (FRCP 1.090(e)), making it 25 calendar days. If the 20th or 25th day falls on a weekend or Florida court holiday, the deadline moves to the next business day. Verify current Florida court holidays at flcourts.gov, as Florida observes additional state holidays beyond the 11 federal holidays.

Conclusion

Our free deadline calculator covers calendar days, business days, and court days under FRCP Rule 6(a) with US federal holidays excluded automatically. It handles legal deadline calculations for federal courts, Texas (TRCP Rule 99 answer deadlines, Texas discovery deadlines, Texas pretrial deadlines), California (CCP mail-service extensions, MSJ deadlines), and Florida — plus specialty deadlines including 1031 exchange, PCT patent national phase, SEC filings, and discovery served by mail. Always verify calculated deadlines with your court’s local rules or your attorney. Never rely solely on any online calculator for actual legal filings.