Supreme Court Rule 13.5
For good cause, a Justice may extend the time to file a petition for awrit of certiorari for a period not exceeding 60 days. An application to extend the time to file shall set out the basis for jurisdiction in this Court, identify the judgment sought to be reviewed, include a copy of the opinion and any order respecting rehearing, and set out specific reasons why an extension of time is justified. The application must be filed with the Clerk at least 10 days before the date the petition is due, except in extraordinary circumstances. The application must clearly identify each party for whom an extension is being sought, as any extension that might be granted would apply solely to the party or parties named in the application. For the time and manner of presenting the application, see Rules 21, 22, 30, and 33.2. An application to extend the time to file a petition for a writ of certiorari is not favored.
https://www.law.cornell.edu/rules/supct/rule_13