app/views/admin/auctions/_time_selector.html.erb
<div class="time usa-width-one-half">
<div><%= label_tag("Time") %></div>
<select class="usa-width-one-third" name="auction[<%=field%>_at(1i)]" id="auction_<%=field%>_at_1i">
<%= options_for_select((1..12).to_a, selected: auction.hour_default(field)) %>
</select>
<select class="usa-width-one-third" name="auction[<%=field%>_at(2i)]" id="auction_<%=field%>_at_2i">
<%= options_for_select(['00', '15', '30', '45'], selected: auction.minute_default(field)) %>
</select>
<select class="usa-width-one-third" name="auction[<%=field%>_at(3i)]" id="auction_<%=field%>_at_3i">
<%= options_for_select(['AM', 'PM'], selected: auction.meridiem_default(field)) %>
</select>
</div>