Copy and paste this code into your website.
<a href="http://www.gpshoresmi.gov/login.aspx?ReturnUrl=%252FCalendar%252FTabId%252F6009%252FPgrID%252F15914%252FPageID%252F2%252FModuleID%252F8923%252FItemID%252F15116%252Fmctl%252FEventDetails%252FDefault.aspx">Your Link Name</a>