March 9-15th.
Left Guatemala on the 9th and arrived in Rio de Janeiro early on the 10th. Few hours later I was back again at Iguazu Falls after an 11 year absence. Stayed at really nice hotel in private room with a pool for $20 a night due to low tourism. The hotel also had a dinner buffet that was crazy cheap at about $4.
The weather was not cooperating and there was rain the first 2 days. Sunshine predicted for day 4 of my trip but the Park is closed on Monday, of course. I took my next best shot and went on Sunday . While overcast, the day was perfect with no rain. I got there early by taking a bus and 2.5 hours later I left. Brazil's side of Iguazu Falls is much smaller than Argentina but supposedly has more picturesque opportunities. Good time, leaving for 8 nights in Rio on the 15th.