1. Weather conditions
Climate in Lithuania has its contrasts. You should check weather forecast just before the summit, because now it is really difficult to predict weather conditions. Just in case, it is recommended to be prepared for rainy weather.
The currency in Lithuania is euro. You can pay by your credit or debit cards in most of the places, but it is very good to have some cash.
3. Local time in Lithuania
GMT + 2 hours.
You can check it here http://www.worldtimeserver.com/current_time_in_LT.aspx
The summit will take place in the municipality building of Vilnius, so you are advised to be dressed up in semi-formal style during the sessions.
5. Visa and travel insurance
Do not forget your European health insurance card (for European citizens) or just simply your private travel insurance.
Make sure you have a visa to enter Lithuania.
6. Electrical plug
Voltage is 220-240 Volts.
7. Additional nights
If you are arriving earlier or staying longer in Vilnius, there will be a possibility to book additional nights in Ecotel Hotel.