---
title: "Computing and Extending Time"
citation: "Fed. R. Crim. P. 45"
authority_id: "AUTH-FRCRIM-P-45"
authority_type: "rule"
jurisdiction: "federal_nationwide"
precedential_status: "binding_national_procedural_rule"
official_url: "https://www.govinfo.gov/content/pkg/USCODE-2024-title18/pdf/USCODE-2024-title18-app.pdf"
url: "https://jason93.com/legal/federal-process/authorities/AUTH-FRCRIM-P-45/"
legal_review: "2026-08-25"
links_checked: "2026-10-15"
links_available: 1
links_checked_count: 1
license: "CC BY 4.0"
---

# Federal Rule of Criminal Procedure 45

## Propositions supported

- Rule 45(a)(1) controls computation of periods stated in days.
- Rule 45(b)(1) governs extensions before and after a deadline.
- Rule 45(b)(2)'s current exception names Rule 35, not Rule 33.

## Material limitations

Whether excusable neglect is established is fact-specific and governed by controlling precedent. This card does not supply a nationwide application test.

## Official source and locator

GovInfo, Title 18 Appendix, Rule 45, pages 174–177 of the printed appendix: <https://www.govinfo.gov/content/pkg/USCODE-2024-title18/pdf/USCODE-2024-title18-app.pdf>


## Used in

- [Federal Rule of Criminal Procedure 33 — New Trial](https://jason93.com/legal/federal-process/modules/30-plea-and-trial/rule-33-new-trial.md)
- [Arraignment and Pretrial Disclosure](https://jason93.com/legal/federal-process/modules/20-pretrial/arraignment-and-pretrial-disclosure.md)
- [Rules 35 and 36 — Sentence Correction, Assistance, Record Error, and Appeals](https://jason93.com/legal/federal-process/modules/70-sentence-modification/rules-35-36-and-modification-appeals.md)