Foto: "<a href="https://ccby.de/foto/april-monthly-calendar-with-funny-sticky-notes-april-fools-day-jokes/1035345" target="_blank">April monthly calendar with funny sticky notes. april fools day jokes</a>" von <a href="https://ccby.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://ccby.de" target="_blank">ccby.de</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>