e="time_reference_specification">TIME REFERENCE SPECIFICATION</a></h2>
<p>The time reference specification is used, well, to establish a reference
moment in time (to which the time offset is then applied to). When present,
it should come first, when omitted, it defaults to <strong>now</strong>. On its own part,
time reference consists of a <em>time-of-day</em> reference (which should come
first, if present) and a <em>day</em> reference.</p>
<p>The <em>time-of-day</em> can be specified as <strong>HH:MM</stro