D-Link DFL-2500 User Guide - Page 116
Daylight Saving TimeDST
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11.1. Setting the Date and Time 97 11.1.3 Daylight Saving Time(DST) Many regions honor Daylight Saving Time (DST) (or summer time as it is called in many countries). Daylight saving time works by advancing the clock during summer to get more out of the summer days. Unfortunately, the principles regulating daylight saving time vary in different countries, and in some cases there are even variants within the same country. For this reason, the product does not automatically know when to adjust for DST. Instead, this information has to be manually provided if daylight saving time is to be used. There are basically two parameters governing daylight saving time; the DST period and the DST offset. The DST period specifies on what dates daylight saving time starts and ends, respectively. The DST offset indicates the number of minutes to advance the clock during the daylight saving time period. Example: To enable DST, follow the steps outlined below: WebUI : System → Date and Time: Time zone and daylight saving time settings Check Enable daylight saving time Offset: enter the number of minutes the clock should be advanced during DST. Start Date: select the starting date for DST period in the dropdown list. End Date: select the ending date. Then click OK. D-Link Firewalls User's Guide