nextcloud/apps/calendar/templates/part.showevent.php

<div id="event" title="<?php echo $l->t("View an event");?>">
<ul>
	<li><a href="#tabs-1"><?php echo $l->t('Eventinfo'); ?></a></li>
	<li><a href="#tabs-2"><?php echo $l->t('Repeating'); ?></a></li>
	<!--<li><a href="#tabs-3"><?php echo $l->t('Alarm'); ?></a></li>
	<li><a href="#tabs-4"><?php echo $l->t('Attendees'); ?></a></li>-->
</ul>
<div id="tabs-1">
	<table width="100%">
		<tr>
			<th width="75px"><?php echo $l->t("Title");?>:</th>
			<td>
				<?php echo isset($_['title']) ? htmlspecialchars($_['title']) : '' ?>
			</td>
		</tr>
	</table>
	<table width="100%">
		<tr>
			<th width="75px"><?php echo $l->t("Category");?>:</th>
			<td>
				<?php
				if(count($_['categories']) == 0){
					echo $l->t('No categories selected');
				}else{
					echo '<select id="category" name="categories[]" multiple="multiple" title="' .  $l->t("Select category") . '">';
					echo OCP\html_select_options($_['categories'], $_['categories'], array('combine'=>true));
					echo '</select>';
				}
				?>
			</td>
			<th width="75px">&nbsp;&nbsp;&nbsp;<?php echo $l->t("Calendar");?>:</th>
			<td>
				<select name="calendar" disabled="disabled">
					<option>
					<?php
					$calendar = OC_Calendar_App::getCalendar($_['calendar']);
					echo $calendar['displayname'] . ' ' . $l->t('of') . ' ' . $calendar['userid'];
					?>
					</option>
					
				</select>
			</td>
			<th width="75px">&nbsp;</th>
			<td>
				<input type="hidden" name="calendar" value="<?php echo $_['calendar_options'][0]['id'] ?>">
			</td>
		</tr>
	</table>
	<hr>
	<table width="100%">
		<tr>
			<th width="75px"></th>
			<td>
				<input onclick="Calendar.UI.lockTime();" type="checkbox"<?php if($_['allday']){echo 'checked="checked"';} ?> id="allday_checkbox" name="allday" disabled="disabled">
				<?php echo $l->t("All Day Event");?>
			</td>
		</tr>
		<tr>
			<th width="75px"><?php echo $l->t("From");?>:</th>
			<td>
				<?php echo $_['startdate'];?>
				&nbsp;&nbsp; <?php echo (!$_['allday'])?$l->t('at'):''; ?> &nbsp;&nbsp;
				<?php echo $_['starttime'];?>
			</td>
		</tr>
		<tr>
			<th width="75px"><?php echo $l->t("To");?>:</th>
			<td>
				<?php echo $_['enddate'];?>
				&nbsp;&nbsp; <?php echo (!$_['allday'])?$l->t('at'):''; ?> &nbsp;&nbsp;
				<?php echo $_['endtime'];?>
			</td>
		</tr>
	</table>
	<input type="button" class="submit" value="<?php echo $l->t("Advanced options"); ?>" onclick="Calendar.UI.showadvancedoptions();" id="advanced_options_button">
	<div id="advanced_options" style="display: none;">
		<hr>
		<table>
			<tr>
				<th width="85px"><?php echo $l->t("Location");?>:</th>
				<td>
					<?php echo isset($_['location']) ? htmlspecialchars($_['location']) : '' ?>
				</td>
			</tr>
		</table>
		<table>
			<tr>
				<th width="85px" style="vertical-align: top;"><?php echo $l->t("Description");?>:</th>
				<td>
					<?php echo isset($_['description']) ? htmlspecialchars($_['description']) : '' ?></textarea>
			</tr>
		</table>
	</div>
	</div>
<div id="tabs-2">
	<table style="width:100%">
			<tr>
				<th width="75px"><?php echo $l->t("Repeat");?>:</th>
				<td>
				<select id="repeat" name="repeat">
					<?php
					echo OCP\html_select_options(array($_['repeat_options'][$_['repeat']]), $_['repeat']);
					?>
				</select></td>
				<td><input type="button" style="float:right;" class="submit" value="<?php echo $l->t("Advanced"); ?>" onclick="Calendar.UI.showadvancedoptionsforrepeating();" id="advanced_options_button"></td>
			</tr>
		</table>
		<div id="advanced_options_repeating" style="display:none;">
			<table style="width:100%">
				<tr id="advanced_month" style="display:none;">
					<th width="75px"></th>
					<td>
						<select id="advanced_month_select" name="advanced_month_select">
							<?php
							echo OCP\html_select_options(array($_['repeat_month_options'][$_['repeat_month']]), $_['repeat_month']);
							?>
						</select>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_year" style="display:none;">
					<th width="75px"></th>
					<td>
						<select id="advanced_year_select" name="advanced_year_select">
							<?php
							echo OCP\html_select_options(array($_['repeat_year_options'][$_['repeat_year']]), $_['repeat_year']);
							?>
						</select>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_weekofmonth" style="display:none;">
					<th width="75px"></th>
					<td id="weekofmonthcheckbox">
						<select id="weekofmonthoptions" name="weekofmonthoptions">
							<?php
							echo OCP\html_select_options(array($_['repeat_weekofmonth_options'][$_['repeat_weekofmonth']]), $_['repeat_weekofmonth']);
							?>
						</select>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_weekday" style="display:none;">
					<th width="75px"></th>
					<td id="weeklycheckbox">
						<select id="weeklyoptions" name="weeklyoptions[]" multiple="multiple" style="width: 150px;" title="<?php echo $l->t("Select weekdays") ?>">
							<?php
							if (!isset($_['weekdays'])) {$_['weekdays'] = array();}
							echo OCP\html_select_options(array($_['repeat_weekly_options'][$_['repeat_weekdays']]), $_['repeat_weekdays'], array('combine'=>true));
							?>
						</select>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_byyearday" style="display:none;">
					<th width="75px"></th>
					<td id="byyeardaycheckbox">
						<select id="byyearday" name="byyearday[]" multiple="multiple" title="<?php echo $l->t("Select days") ?>">
							<?php
							if (!isset($_['repeat_byyearday'])) {$_['repeat_byyearday'] = array();}
							echo OCP\html_select_options(array($_['repeat_byyearday_options'][$_['repeat_byyearday']]), $_['repeat_byyearday'], array('combine'=>true));
							?>
						</select><?php echo $l->t('and the events day of year.'); ?>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_bymonthday" style="display:none;">
					<th width="75px"></th>
					<td id="bymonthdaycheckbox">
						<select id="bymonthday" name="bymonthday[]" multiple="multiple" title="<?php echo $l->t("Select days") ?>">
							<?php
							if (!isset($_['repeat_bymonthday'])) {$_['repeat_bymonthday'] = array();}
							echo OCP\html_select_options(array($_['repeat_bymonthday_options'][$_['repeat_bymonthday']]), $_['repeat_bymonthday'], array('combine'=>true));
							?>
						</select><?php echo $l->t('and the events day of month.'); ?>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_bymonth" style="display:none;">
					<th width="75px"></th>
					<td id="bymonthcheckbox">
						<select id="bymonth" name="bymonth[]" multiple="multiple" title="<?php echo $l->t("Select months") ?>">
							<?php
							if (!isset($_['repeat_bymonth'])) {$_['repeat_bymonth'] = array();}
							echo OCP\html_select_options(array($_['repeat_bymonth_options'][$_['repeat_bymonth']]), $_['repeat_bymonth'], array('combine'=>true));
							?>
						</select>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr id="advanced_byweekno" style="display:none;">
					<th width="75px"></th>
					<td id="bymonthcheckbox">
						<select id="byweekno" name="byweekno[]" multiple="multiple" title="<?php echo $l->t("Select weeks") ?>">
							<?php
							if (!isset($_['repeat_byweekno'])) {$_['repeat_byweekno'] = array();}
							echo OCP\html_select_options(array($_['repeat_byweekno_options'][$_['repeat_byweekno']]), $_['repeat_byweekno'], array('combine'=>true));
							?>
						</select><?php echo $l->t('and the events week of year.'); ?>
					</td>
				</tr>
			</table>
			<table style="width:100%">
				<tr>
					<th width="75px"><?php echo $l->t('Interval'); ?>:</th>
					<td>
						<?php echo isset($_['repeat_interval']) ? $_['repeat_interval'] : '1'; ?>
					</td>
				</tr>
				<tr>
					<th width="75px"><?php echo $l->t('End'); ?>:</th>
					<td>
						<select id="end" name="end">
							<?php
							if($_['repeat_end'] == '') $_['repeat_end'] = 'never';
							echo OCP\html_select_options(array($_['repeat_end_options'][$_['repeat_end']]), $_['repeat_end']); 
							?>
						</select>
					</td>
				</tr>
				<tr>
					<th></th>
					<td id="byoccurrences" style="display:none;">
						<?php echo $_['repeat_count'] . ' ' . $l->t('occurrences'); ?>
					</td>
				</tr>
				<tr>
					<th></th>
					<td id="bydate" style="display:none;">
						<?php echo $_['repeat_date']; ?>
					</td>
				</tr>
			</table>
		</div>
</div>
<!--<div id="tabs-3">//Alarm</div>
<div id="tabs-4">//Attendees</div>-->

</div>