Retirees usually get their Social Security benefits on Wednesday, but for the fourth week of December this will not happen due to a calendar irregularity.

Millions of Social Security beneficiaries will receive their December retirement checks, worth up to $4,873 per check for those who retire at 70 years old, in two days. Social Security beneficiaries who were born from the 11th through the 20th of a month will receive their regular monthly checks for December from the Social Security Administration on Wednesday.

A review of the legislation by the Congressional Budget Office, a nonpartisan federal agency in the legislative branch, found passage of the bill would increase Social Security expenditures, and possibly exhaust the Old-Age and Survivors Insurance Trust Fund six months earlier than the current 2033 projection.