zulip/web/templates/send_later_popover.hbs

<ul id="send_later_popover" class="nav nav-list">
    <li>
        <a class="open_send_later_modal" tabindex="0">{{t "Schedule message" }}</a>
    </li>
    {{#if formatted_send_later_time}}
        <li>
            <a class="send_later_selected_send_later_time" tabindex="0">{{t 'Schedule for {formatted_send_later_time}' }}</a>
        </li>
    {{/if}}
    <hr />
    <li>
        <a href="#scheduled" tabindex="0">{{t "View scheduled messages" }}</a>
    </li>
</ul>