No, it was May 2020, just what your graph shows.
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Understanding M1
"M1 money is a country’s basic money supply that's used as a medium of exchange. M1 includes demand deposits and checking accounts, which are the most commonly used exchange mediums through the use of debit cards and ATMs. Of all the components of the money supply, M1 is defined the most narrowly. M1 does not include financial assets, such as bonds. M1 money is the money supply metric most frequently utilized by economists to reference how much money is in circulation in a country.
Note that in May 2020, the definition of M1 changed to include savings accounts given the increased liquidity of such accounts."
M1 is the money supply that encompasses physical currency and coin, demand deposits, traveler's checks, and other checkable deposits.
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