Hi can I add some info on the page. please see the picture.
I think the picture's missing. But in general you'll have to modify the relevant page yourself.
You seem to have CSS turned off.
Please don't fill out this field.
Please see the picture. Can I add below command in day.php to show my info?
echo "My info";
Yes, just add in your HTML after line 40 of day.php, eg
// Show all available areas
echo make_area_select_html('day.php', $area, $year, $month, $day);
Your text in here
// Draw the three month calendars
thank you so much, it is working.