Contributed By: Cliff Hobbs [MVP SMS]
If you're using daily recurring schedules for your Advertisements you may experience the following problems whenever the time changes from British Summer Time (BST) to/ from Greenwich Mean Time (GMT or "Coordinated Universal Time" as it's otherwise known):

• Daily recurring Adverts you create during BST run an hour too early when the time changes to GMT.
• Daily recurring Adverts you create during GMT run an hour too late when the time changes to BST.

Microsoft are aware of this issue and have released a hotfix under KB Article 933870 "Advertisements that have a recurring schedule are off by one hour in SMS 2003 when the time changes between British Summer Time (BST) and Coordinated Universal Time".
 

To see other SMS 2003 Troubleshooting FAQs click here.