ロンドン、イギリスの現在時刻（ライブ）

Time in London, United Kingdom (LIVE) 12h 24h Analog Digital Time in London Current local time in London , England, United Kingdom 12h 24h Analog Digital 1 1 : 1 7 : 4 1 PM Wednesday, May 6, 2026 Timezone in London Greenwich Mean Time IANA identifier: Europe/London CURRENTLY ACTIVE BST British Summer Time UTC+1 DURING WINTER Greenwich Mean Time UTC+0 Time Difference Currently, time in London is 8 hours behind your location (Osaka) Daylight in London today Sunrise 5:24 AM Sunset 8:28 PM Daylight 15h 3m Daylight Saving Time (DST) in London DST started March 29, 2026 (clocks moved forward 1 hour) Switched from GMT (UTC+0) to BST (UTC+1) DST ends October 25, 2026 (clocks move backward 1 hour) Will switch from BST (UTC+1) to GMT (UTC+0) Next Time Change Calculating... Turn clocks 1 hour backward On Sunday, October 25, 2026 At 02:00 01:00 DST Schedule (Recent & Upcoming Years) Year DST Start (Spring Forward) DST End (Fall Back) 2025 Mar 30, 2025, 01:00 Oct 26, 2025, 02:00 2026 Mar 29, 2026, 01:00 Oct 25, 2026, 02:00 2027 Mar 28, 2027, 01:00 Oct 31, 2027, 02:00 2028 Mar 26, 2028, 01:00 Oct 29, 2028, 02:00 Los Angeles New York London Paris Tokyo What is UTC? UTC (Coordinated Universal Time) is the world’s primary time standard. All time zones are defined by how many hours they are ahead of (+) or behind (–) UTC. In many places, this offset changes twice a year because of Daylight Saving Time (DST). For example, London is UTC+0 in winter and UTC+1 in summer. UTC is computed by the Bureau International des Poids et Mesures (BIPM) using data from about 450 atomic clocks in 85 national laboratories worldwide. Why use UTC offsets instead of just timezone names? UTC offsets are unambiguous. Time zone abbreviations like “EST” or “CST” are not, because they are used in multiple unrelated regions. For example: “Eastern Time” exists in both North America (UTC-5/UTC-4) and Australia (UTC+10/UTC+11). “CST” can mean U.S. Central Standard Time, China Standard Time, Cuba Standard Time, and more. A UTC offset always indicates a clear, fixed relationship to UTC. What is the difference between GMT and UTC? For most everyday purposes, GMT and UTC are the same, since both represent UTC+0. The difference is technical: GMT is the older term, based on the average solar time at the Royal Observatory in Greenwich, London. UTC is the current global standard, introduced in 1972. It is based on atomic clocks, making it more precise. What is Daylight Saving Time (DST)? Daylight Saving Time (DST) is when clocks are moved forward by one hour in spring ("spring forward") and moved back by one hour in fall ("fall back"). The purpose is to extend evening daylight. During DST, a location may use a different time zone name and a different UTC offset. For example, London switches from GMT ( UTC+0 ) in winter to BST ( UTC+1 ) in summer. Not all places observe DST. Some regions, such as most of Arizona and Hawaii in the United States, stay on the same time all year. Does London observe Daylight Saving Time? Yes. Clocks move forward on the fifth Sunday in March at 2:00 AM , and move back on the fourth Sunday in October at 1:00 AM . What time zone is London in? London is in the Greenwich Mean Time ( GMT ). What is the difference between GMT and BST ? These are the two seasonal versions of Greenwich Mean Time : GMT ( UTC+0 ), which stands for " Greenwich Mean Time," is used in winter. BST ( UTC+1 ), which stands for "British Summer Time," is used in summer. What is an IANA time zone identifier? IANA (Internet Assigned Numbers Authority) time zone identifiers are the official, permanent names used by computers to handle time correctly, including DST rules. They use the format Continent/City, such as America/New_York or Europe/London . These identifiers ensure that devices automatically use the correct offset and DST transitions for each region. The IANA time zone identifier for London is Europe/London .