MDY may refer to:
* MDY,
month–day–year format
A calendar date is a reference to a particular day, represented within a calendar system, enabling a specific day to be unambiguously identified. Simple math can be performed between dates; commonly, the number of days between two dates may be ca ...
for writing out dates
* MDY, IATA airport code for
Henderson Field (Midway Atoll)
Henderson Field is a public airport located on Sand Island in Midway Atoll, an unincorporated territory of the United States. The airport is used as an emergency diversion point for ETOPS operations. It is one of three airfields named after Ma ...
* MDY Industries, creator of the
Glider bot software
* MDY, NYSE Arca ticker symbol for MidCap 400 SPDR, an
American exchange-traded fund
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