ICPP8 - Rennes 2027

Climate

Early July is one of the best times to visit Rennes. The weather is generally mild and pleasant, with average daytime temperatures ranging from 22°C to 26°C (72–79°F) and cooler evenings around 13–16°C (55–61°F). While sunny weather is common, occasional rain showers are possible.

Language

The official language in France is French. However, English is commonly spoken in hotels, restaurants, tourist attractions, and by many university staff and students.

Time zone

Rennes operates on Central European Summer Time (CEST, UTC+2) during July.

Currency, Credit Cards and Exchange Rate

France uses the Euro (€).

Major international credit and debit cards (Visa, Mastercard, American Express) are widely accepted. Contactless payment is common, and mobile payment services such as Apple Pay and Google Pay are accepted in most businesses.

Although cash is becoming less necessary, it is still useful for small purchases.

Taxes

In France, VAT (Value Added Tax) is already included in displayed prices.

The standard VAT rate is 20%, while reduced rates apply to certain goods and services such as restaurants (10%).

Most accommodation providers also charge a tourist tax ("taxe de séjour"), which varies depending on the type of accommodation and is generally payable directly to the hotel upon arrival or departure.

Tipping

Tipping is not mandatory in France, as service is included in restaurant prices.

However, leaving a small tip (around 5–10% or simply rounding up the bill) is appreciated for excellent service.

Wi-Fi

Free Wi-Fi is widely available throughout Rennes.

You can easily access Wi-Fi in hotels, cafés and restaurants, Rennes Metro stations, public libraries, the conference venue, and many public spaces in the city centre.

Business Hours

Typical opening hours are:

• Shops: Monday to Saturday, approximately 10:00 AM – 7:00 PM
• Supermarkets: generally 8:30 AM – 8:30 PM
• Banks: Monday to Friday, approximately 9:00 AM – 5:00 PM
• Many businesses close on Sundays, although some supermarkets and convenience stores remain open.

Emergency Numbers

• 112 – European Emergency Number (Police, Fire or Ambulance)

• 15 – Medical Emergency (SAMU)

• 17 – Police

• 18 – Fire Brigade

• 114 – Emergency SMS service for people with hearing or speech impairments

Voltage

France uses 230 volts, 50 Hz, with Type C and Type E plugs.

Participants travelling from countries using different plug types or voltages should bring an appropriate travel adapter.

Drinking Water

Tap water in Rennes is safe to drink and meets strict European quality standards. Bringing a reusable water bottle is encouraged, as refill points are available throughout the city and on campus.

Pharmacies

Pharmacies are easily identifiable by their green illuminated cross. Most are open from 9:00 AM to 7:00 PM, and an on-duty pharmacy ("pharmacie de garde") is available outside regular opening hours.