Healing concert for the underprivileged (Seoul Jungjin School) SMPA Promotions Unit and Police Band, the date of the event is unclear.

{p/n: according to what @joeylfy said here, there is a possibility it was held on 4/12 based on what appeared in the camera properties, but it is still not certain as it might not have been set properly}

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Credits:

SEOUL METROPOLITAN POLICE AGENCY,
In English via @joeylfy: 1 and 2,
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