([regex_zzzz][ ]*)?(([regex_ampm])[ ]*)[regex_hms] ([regex_hms])([ ]*([regex_ampm]))?(\s*\(?[regex_zzzz]\)?(?![.:]?\d)){0,1} : AM|a\.m\. PM|p\.m\. noon Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec January|February|March|April|May|June|July|August|September|October|November|December Sun|Mon|Tue|Wed|Thu|Fri|Sat Sun|Mon|Tue|Wed|Thu|Fri|Sat Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday today|tomorrow this\s+Sunday|this\s+Monday|this\s+Tuesday|this\s+Wednesday|this\s+Thursday| this\s+Friday|this\s+Saturday next\s+Sunday|next\s+Monday|next\s+Tuesday|next\s+Wednesday|next\s+Thursday| next\s+Friday|next\s+Saturday mdy , zh