When to buy savings bonds

I would like to purchase I bonds, probably through Treasury Direct. Can I bonds be purchased at any time during the year?

Tom's response

Unlike other Treasury securities, which can be purchased only on specific days, both series I bonds and series EE bonds are available on any business day of the year.

Moreover, Savings Bonds earn interest from the first day of the month no matter what day you invest, so there's a slight boost by buying them near the end of the month.

When you buy at a bank, the bond's issue month will be the day of the bank transaction, but when you buy through Treasury Direct, the issue month is the day the Treasury gets the money from your bank, so schedule the purchase a few days ahead of the last business day of the month.