I am scheduled to arrive at 12:05 am to Suvarnabhumi.  If my flight is early and to immigration quickly (5555) before midnight, will they stamp me that day's date, or will they stamp it the day I was to arrive at 12:05 am?    Thanks.

They'll stamp you as per the date you present your passport. If it's 11:55 and the one day is critical then I'd wait 5 minutes (or even 10 minutes to be safer)

let us know if you get stamped the old 30 days or the "proposed" new 60 days please....it is now a week past the first announced deadline of june 1 so hopefully the word has been passed to the airport immigration guys with the stamps...or not.

3 hours ago, mushroomdave said:

I am scheduled to arrive at 12:05 am to Suvarnabhumi.  If my flight is early and to immigration quickly (5555) before midnight, will they stamp me that day's date, or will they stamp it the day I was to arrive at 12:05 am?    Thanks.

In the unlikely event your flight is early, just trawl the duty free shops or walk instead of using the travelator (standing still on the travelator is even slower) and, before you know it, you will arrive at immigration tomorrow.

3 hours ago, pomchop said:

let us know if you get stamped the old 30 days or the "proposed" new 60 days please....it is now a week past the first announced deadline of june 1 so hopefully the word has been passed to the airport immigration guys with the stamps...or not.

 

Jeez, it has not even been gazetted yet!

4 hours ago, pomchop said:

let us know if you get stamped the old 30 days or the "proposed" new 60 days please....it is now a week past the first announced deadline of june 1 so hopefully the word has been passed to the airport immigration guys with the stamps...or not.

The answer to that question is very clear.

6 hours ago, mushroomdave said:

I am scheduled to arrive at 12:05 am to Suvarnabhumi

 

That is likely when the aircraft is due to land on the runway at BKK. It will then spend 10-15 minutes taxiing to the arrival gate - and, assuming that you're travelling economy, you'll then need to wait a further 5-10 minutes for business class passengers to disembark before you can.

Not that you are incorrect  but please use the 24 hour time. Way too many people miss their flight or get there 12 hours early.

Removed an off-topic post.