"Beer many not be purchased after midnight on Sunday, but can be purchased anytime on Monday" So it's illegal to buy it when its legal to buy it?
Breweries are not allowed to talk about their beer in public, promote their beer, or let people know where they can purchase the beer, even though they can't sell it themselves.\ except for consumption on premesis (no taking you favorite beer home).
On that first note, midnight begins the day. You go from 11:59 PM Saturday night to midnight Sunday. Also, that restriction only applies to grocery stores and the like. Bars, clubs, and the like can sell until 2:00 AM. However, after their respective "shutdown" time, I always understood that no one could sell alcohol until noon on Sunday. There must be some sort of exception to that, though, since I see so many brunch places pouring mimosas, bloody maries, and who knows what all else well before noon.
The second part is LARGELY overstated to the point where there is less true than false. Breweries in Texas can promote their products and do all the time. There are ads all over the place. They are limited in what they can say, but they can promote. There is some restriction on telling customers where to buy their products, though that has been pulled back recently, and I do not know all the details on that (and don't care to look up the code section

).
It is absolutely correct that Texas breweries cannot sell their products on premises (even for consumption there - though they can give it away). Texas wineries have that right, but not Texas breweries. However, there is a bill in the Texas House of Representatives right now to allow breweries to sell up to 5000 barrels per year on premises. It is set for public hearing on March 18. Write your legislators! Hell, show up at the hearing (but don't act like drunks).
TL