Is the Thai consulate in Laos open on July 31st, 2018?

@Bec ********

just so you're clear about land entries

You can enter the country by land TWO times in a year without a visa <- meaning you get stamped in for 30 days for free

BUT

you can enter the country as many times as you want in a year IF you BUY a visa from thai consulate.

The limit of two is ONLY on entering the country without any visa in your passport.

@Bec ********

, I'd say your thai teacher is wrong. Here's the list of holidays for Vientiane 2018

According to their website it is open on the 31st, closed on the 30th.