What is Universal Time Coordinated (UTC)?

UTC (Universal Time Coordinated) is used as the basis for calculating the local time.
Example for Germany:
Local time for Berlin is UTC+1 (during summer time it is UTC+2). The OAI server gives the time in UTC.
If the local time is 10:30, it therefore only makes sense to harvest until UTC 09:29, or until UTC 08:29 in summer time.