A device comprising: a communicator that is configured to perform wireless communication with an external device; one or more radio wave receivers (63, 51), different from the communicator, that is configured to receive radio waves with signals including time information; one or more processors (41, 52); wherein the one or more processors are configured to: acquire time information by performing one or more of: a first acquisition operation to control the communicator to communicate with an external device to receive signals including the time information; and a second acquisition operation to control the one or more radio wave receivers to receive transmission radio waves with signals including the time information, wherein a time required to acquire the time information by performing the first acquisition operation is shorter than a time required to acquire the time information by performing the second acquisition operation, and/or an amount of power consumption required to acquire the time information by performing the first acquisition operation is lower than an amount of power consumption required to acquire the time information by performing the second acquisition operation, and wherein performance of the first acquisition operation is prioritized over performance of the second acquisition operation such that the time information is acquired at least at a predetermined lower limit frequency; and perform a correction operation of correcting a current time counted by a clock circuit based on the time information acquired. a communicator that is configured to perform wireless communication with an external device; one or more radio wave receivers (63, 51), different from the communicator, that is configured to receive radio waves with signals including time information; one or more processors (41, 52); wherein the one or more processors are configured to: acquire time information by performing one or more of: a first acquisition operation to control the communicator to communicate with an external device to receive signals including the time information; and a second acquisition operation to control the one or more radio wave receivers to receive transmission radio waves with signals including the time information, wherein a time required to acquire the time information by performing the first acquisition operation is shorter than a time required to acquire the time information by performing the second acquisition operation, and/or an amount of power consumption required to acquire the time information by performing the first acquisition operation is lower than an amount of power consumption required to acquire the time information by performing the second acquisition operation, and wherein performance of the first acquisition operation is prioritized over performance of the second acquisition operation such that the time information is acquired at least at a predetermined lower limit frequency; and perform a correction operation of correcting a current time counted by a clock circuit based on the time information acquired. wherein the one or more processors are configured to: acquire time information by performing one or more of: a first acquisition operation to control the communicator to communicate with an external device to receive signals including the time information; and a second acquisition operation to control the one or more radio wave receivers to receive transmission radio waves with signals including the time information, wherein a time required to acquire the time information by performing the first acquisition operation is shorter than a time required to acquire the time information by performing the second acquisition operation, and/or an amount of power consumption required to acquire the time information by performing the first acquisition operation is lower than an amount of power consumption required to acquire the time information by performing the second acquisition operation, and wherein performance of the first acquisition operation is prioritized over performance of the second acquisition operation such that the time information is acquired at least at a predetermined lower limit frequency; and a first acquisition operation to control the communicator to communicate with an external device to receive signals including the time information; and a second acquisition operation to control the one or more radio wave receivers to receive transmission radio waves with signals including the time information, wherein a time required to acquire the time information by performing the first acquisition operation is shorter than a time required to acquire the time information by performing the second acquisition operation, and/or an amount of power consumption required to acquire the time information by performing the first acquisition operation is lower than an amount of power consumption required to acquire the time information by performing the second acquisition operation, and wherein performance of the first acquisition operation is prioritized over performance of the second acquisition operation such that the time information is acquired at least at a predetermined lower limit frequency; and perform a correction operation of correcting a current time counted by a clock circuit based on the time information acquired.