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 <span style="color: #008080;">include</span> <span style="color: #000000;">builtins<span style="color: #0000FF;">\<span style="color: #004080;">timedate<span style="color: #0000FF;">.<span style="color: #000000;">e</span>
 <span style="color: #7060A8;">set_timedate_formats<span style="color: #0000FF;">(<span style="color: #0000FF;">{<span style="color: #008000;">"Mmmm d yyyy h:mmpm tz"<span style="color: #0000FF;">}<span style="color: #0000FF;">)</span>
 <span style="color: #004080;">timedate</span> <span style="color: #000000;">td</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">parse_date_string<span style="color: #0000FF;">(<span style="color: #008000;">"March 7 2009 7:30pm EST"<span style="color: #0000FF;">)</span>
 <span style="color: #004080;">atom</span> <span style="color: #000000;">twelvehours</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">timedelta<span style="color: #0000FF;">(<span style="color: #000000;">hours<span style="color: #0000FF;">:=<span style="color: #000000;">12<span style="color: #0000FF;">)</span>
 <span style="color: #000000;">td</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">adjust_timedate<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">,<span style="color: #000000;">twelvehours<span style="color: #0000FF;">)</span>
 <span style="color: #0000FF;">?<span style="color: #7060A8;">format_timedate<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">)</span>
 <span style="color: #000000;">td</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">change_timezone<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">,<span style="color: #008000;">"ACDT"<span style="color: #0000FF;">)</span>  <span style="color: #000080;font-style:italic;">-- extra credit</span>
 <span style="color: #0000FF;">?<span style="color: #7060A8;">format_timedate<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">)</span>
 <span style="color: #000000;">td</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">adjust_timedate<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">,<span style="color: #7060A8;">timedelta<span style="color: #0000FF;">(<span style="color: #000000;">days<span style="color: #0000FF;">:=<span style="color: #000000;">31<span style="color: #0000FF;">*<span style="color: #000000;">4<span style="color: #0000FF;">)<span style="color: #0000FF;">)</span>
 <span style="color: #0000FF;">?<span style="color: #7060A8;">format_timedate<span style="color: #0000FF;">(<span style="color: #000000;">td<span style="color: #0000FF;">)
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