People now get one to two hours less sleep each night, on average, compared to 60 years ago. A primary reason for this is the proliferation of electronics, which also allows us to work (and play) later than ever before.
The Internal Revenue Service requires that individuals be able to produce records proving any income, deductions or credit claimed for at least three years from the date of a return, the statute of limitations for how long the I.R.S. has to assess additional tax if all income was reported correctly.
How long to keep books & records. Type of record. How long they must be kept. Copies of tax receipts. Two years after the end of the year in which the donation was made. Financial records. Six years after the end of the most recent year to which they relate (or two years after registration is revoked.