Dates should be written 24 April 2010 (not 24th).
Do not add the day of the week.
Use the following construction for spans of time:
Willibald Karl Jentschke was delegate to council for the Federal Republic of Germany from 1964-67.
Though this often reads better if reworded:
From 1964 to 1967, Willibald Karl Jentschke was delegate to council for the Federal Republic of Germany.
Don’t use “2000-2500 years ago” (or, worse, “between 20-25ºC”). Write “from 2000 to 2500 years ago”, “between 20 and 25ºC” and so on.
Avoid beginning a sentence with a date or digit (see numbers).
Note: To configure the correct date format on a Drupal site, go to admin/config/regional/date-time/formats/40/edit.
The PHP code you need to add in the Format string box is "j M Y, g.ia"