I can't help you with the MS Word sorting, but stuffing the text from the email into Excel and hitting the Sort A To Z spits out this:
Code:
Friday, August 1 Ixtlahuacan Loop
Friday, August 15 Rubin's Milpa, Dancing Rock and Cuevas Indios (Exploration)
Friday, August 22 Cierro Viejo Interpretive Trail
Friday, August 29 Chiquilistlan (Early Start)
Friday, August 8 Four Ridges (Traditional Route) Agave Ridge to Ceremonial Grounds)
Tuesday, August 12 Chupinaya Race Trail
Tuesday, August 19 La Floresta > La Canada (Early Start)
Tuesday, August 26 Goat Farm >Oak Forest > Ixtlahaucan
Tuesday, August 5 Salvaje Race Trail

Adding a 0 to the single date entries (August 8 becomes August 08) fixes the 8 is greater than 29 problem and spits out this:
Code:
Friday, August 01 Ixtlahuacan Loop
Friday, August 08 Four Ridges (Traditional Route) Agave Ridge to Ceremonial Grounds)
Friday, August 15 Rubin's Milpa, Dancing Rock and Cuevas Indios (Exploration)
Friday, August 22 Cierro Viejo Interpretive Trail
Friday, August 29 Chiquilistlan (Early Start)
Tuesday, August 05 Salvaje Race Trail
Tuesday, August 12 Chupinaya Race Trail
Tuesday, August 19 La Floresta > La Canada (Early Start)
Tuesday, August 26 Goat Farm >Oak Forest > Ixtlahaucan

I guess if that is what you want, you can always copy and paste back into Word... but then you would never know your answer laugh