Adelaide operates on Australian Central Standard Time (ACST, UTC+9:30) and Australian Central Daylight Time (ACDT, UTC+10:30) during daylight saving, typically from early October to early April. Many European countries observed on your route share similar time zones, with seasonal daylight saving changes.
The United Kingdom, Portugal, and Ireland (including cities such as London and Manchester) follow Greenwich Mean Time (GMT, UTC+0) in winter and British or Western European Summer Time (UTC+1) from late March to late October. Countries such as France, Germany, Italy, Spain, Belgium, Denmark, Switzerland, and the Netherlands (including Paris, Frankfurt, Munich, Rome, Milan, Barcelona, Brussels, Copenhagen, Zurich, and Amsterdam) use Central European Time (CET, UTC+1) in winter and Central European Summer Time (UTC+2) in summer.
Turkey, including Istanbul, runs on Turkey Time (UTC+3) year-round without daylight saving changes. Depending on the time of year, the time difference between Adelaide and Europe can vary by one hour as either Australia or Europe moves into or out of daylight saving, so it is best to check close to your travel dates.