see
https://www.irs.gov/retirement-plans/retirement-plans-faqs-regarding-iras#rollovers
How long do I have to roll over a distribution from a retirement plan to an IRA?
You must complete the rollover by the 60th day following the day on which you receive the distribution. You may be eligible for an automatic waiver of the 60-day rollover requirement if a financial institution caused the error and other conditions are met. See Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs) and Retirement plans FAQs relating to waivers of the 60-day rollover requirement.
