What seems strange is 29 June to 29 July inclusive is 31 different days, but I thought the visa was a 30 day visa, so I worry that exiting on 29 July might be a problem.
-@edandsuet
It would seem that they are still using the one month system that dates back to the good old days instead of the "30 days" that everyone discusses. In the past, you also got a 3-month visa instead of a "90-day" one, with the date the same, just add 3 to the entry month. Anyway, if that date is stamped in your passport, then that's date you need to leave. You can confirm with a travel agent if you really want to be sure.
Of course, things can happen. I left my passport at at hotel in Sai Gon once, got to the airport and was approaching the check-in counter when I reached into my pocket. I didn't blame the hotel because I checked out and then told them I was going to lunch and would get my bags upon returning, so both of us spaced it out by the time I got back. Ultimately, it's my passport, my responsibility.
Anywayz, they immediately brought it to me and I returned to the counter; staff said you're too late, but... let me check with my supervisor. Then, she said ok but hurry. So, there I was doing my O.J. Simpson run to the gate while hearing my name repeatedly being called on the announcements (Passenger Jay Rozzetti, please report to Gate 12 immediately!) and managed to board the plane as the absolute last passenger.
On another occasion, it was really the last day of my one-year Laos visa, which was somehow January 01. I booked a bus from Champasak village in southern Laos through to Kratie in Cambodia. Early in the morning, a van took me from the guesthouse down the road to a spot where I crossed the Mekong River on a long-tail boat, then I walked up the bank to where a crowd of people were waiting for the bus, which was only about half an hour late. Unfortunately, after a couple hours on the road, the bus broke down about 73 klicks from the border, and the crew was unable to repair the engine. Eventually, a replacement bus showed up about 4 hours later and we made it to 4000 Islands, which is a riverine archipelago in the Mekong that separates Laos from Cambodia an d screwed up French plans to use the river for shipping and transport to China back in the colonial days. I showed the driver my onward ticket and he said "Gone already. Come back tomorrow".
So, I grabbed a motorbike taxi and headed down toward the border with my two bags, duffel and laptop. When I got there the sun was going down, and I was the only tourist around. I managed to check out of Laos and into Cambodia. Then, I had to find transportation to the nearest town, Stung Treng, as there was next to nothing there at the border area.
Best-laid plans of mice and men and all that stuff...
