A method, performed by a first apparatus, the method comprising: - obtaining temporal information communicated to the first apparatus, and - performing one or more of the following checks: - a check to determine whether the first apparatus is in a state after initial startup, after a battery change or other power failure or after a reset, wherein, in the check, it is decided based on information relating to a synchronization that has already taken place, if the first apparatus is in the state after initial startup, after a battery change or other power failure or after a reset, - a check to determine whether a deviation between temporal information (T local) from a clock of the first apparatus and the communicated temporal information is less than or less-than-or-equal to a threshold value that is predefined or determined according to a predefined rule, - a check to determine whether the communicated temporal information has the same date as the temporal information (T local) from the clock of the first apparatus, - synchronizing the clock of the first apparatus using the communicated temporal information if all of one or more predefined conditions are satisfied, wherein one of the one or more conditions requires that at least one of the one or more performed check(s) has yielded a positive result, wherein the one or more performed check(s) at least comprise the check to determine whether the first apparatus is in a state after initial startup, after a battery change or other power failure or after a reset. - obtaining temporal information communicated to the first apparatus, and - performing one or more of the following checks: - a check to determine whether the first apparatus is in a state after initial startup, after a battery change or other power failure or after a reset, wherein, in the check, it is decided based on information relating to a synchronization that has already taken place, if the first apparatus is in the state after initial startup, after a battery change or other power failure or after a reset, - a check to determine whether a deviation between temporal information (T local) from a clock of the first apparatus and the communicated temporal information is less than or less-than-or-equal to a threshold value that is predefined or determined according to a predefined rule, - a check to determine whether the communicated temporal information has the same date as the temporal information (T local) from the clock of the first apparatus, - a check to determine whether the first apparatus is in a state after initial startup, after a battery change or other power failure or after a reset, wherein, in the check, it is decided based on information relating to a synchronization that has already taken place, if the first apparatus is in the state after initial startup, after a battery change or other power failure or after a reset, - a check to determine whether a deviation between temporal information (T local) from a clock of the first apparatus and the communicated temporal information is less than or less-than-or-equal to a threshold value that is predefined or determined according to a predefined rule, - a check to determine whether the communicated temporal information has the same date as the temporal information (T local) from the clock of the first apparatus, - synchronizing the clock of the first apparatus using the communicated temporal information if all of one or more predefined conditions are satisfied, wherein one of the one or more conditions requires that at least one of the one or more performed check(s) has yielded a positive result, wherein the one or more performed check(s) at least comprise the check to determine whether the first apparatus is in a state after initial startup, after a battery change or other power failure or after a reset.