should be possible,
but definitely a complex nested loop that contains date-splitting and count is needed for that. also you probably need to build a own array before you echo something.
my advise is build it at your own, or find/pay someone that can do it for you.
the only help i can give is this tip:
build a array and use this php-functions => date, strtotime, foreach, count
//to get month or year $get_date = get_field('datefield'); $get_date_month = date('m', strtotime($get_date)); $get_date_year = date('Y', strtotime($get_date)); //build a array out of lesson, year, month and day, something like that // $array[$lession][$year][$month][$date] // then use a foreach loop with count on month to build your table
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