Hey Nico,

Most of these are actually defined in the language string If you edit /language/en-GB/en-GB.com_easysocial.ini you will find the formats below:

; @since 1.2
; date / format format
COM_EASYSOCIAL_DATE_DM="jS M"
COM_EASYSOCIAL_DATE_DMY="jS M, Y"
COM_EASYSOCIAL_DATE_MY="M, Y"
COM_EASYSOCIAL_DATE_Y="Y"
COM_EASYSOCIAL_DATE_DMY12H="jS M, Y g:iA"
COM_EASYSOCIAL_DATE_DMY24H="jS M, Y H:i"
COM_EASYSOCIAL_DATE_12H="g:iA"
COM_EASYSOCIAL_DATE_24H="H:i"

Please take note that changing this will also affect the date format throughout EasySocial