DST Changes Calendar
Upcoming Daylight Saving Time transitions worldwide for 2026-2027.
DST data current through 2027 | Based on IANA Time Zone Database
October 2026
BST → GMT (UTC+1 → UTC+0)
Cities: London, Manchester, Edinburgh
IST → GMT (UTC+1 → UTC+0)
Cities: Dublin
WEST → WET (UTC+1 → UTC+0)
Cities: Lisbon, Porto
CEST → CET (UTC+2 → UTC+1)
Cities: Berlin, Hamburg, Munich
CEST → CET (UTC+2 → UTC+1)
Cities: Paris, Lyon, Nice
CEST → CET (UTC+2 → UTC+1)
Cities: Amsterdam
EEST → EET (UTC+3 → UTC+2)
Cities: Helsinki
EEST → EET (UTC+3 → UTC+2)
Cities: Cairo
November 2026
EDT → EST (UTC-4 → UTC-5)
Cities: New York, Philadelphia, Washington D.C.
EDT → EST (UTC-4 → UTC-5)
Cities: Toronto, Montreal, Ottawa
CDT → CST (UTC-5 → UTC-6)
Cities: Chicago, Houston, Dallas
MDT → MST (UTC-6 → UTC-7)
Cities: Denver
PDT → PST (UTC-7 → UTC-8)
Cities: Los Angeles, San Diego, San Francisco
AKDT → AKST (UTC-8 → UTC-9)
Cities: Anchorage
March 2027
EST → EDT (UTC-5 → UTC-4)
Cities: New York, Philadelphia, Washington D.C.
EST → EDT (UTC-5 → UTC-4)
Cities: Toronto, Montreal, Ottawa
CST → CDT (UTC-6 → UTC-5)
Cities: Chicago, Houston, Dallas
MST → MDT (UTC-7 → UTC-6)
Cities: Denver
PST → PDT (UTC-8 → UTC-7)
Cities: Los Angeles, San Diego, San Francisco
AKST → AKDT (UTC-9 → UTC-8)
Cities: Anchorage
GMT → BST (UTC+0 → UTC+1)
Cities: London, Manchester, Edinburgh
GMT → IST (UTC+0 → UTC+1)
Cities: Dublin
WET → WEST (UTC+0 → UTC+1)
Cities: Lisbon, Porto
CET → CEST (UTC+1 → UTC+2)
Cities: Berlin, Hamburg, Munich
CET → CEST (UTC+1 → UTC+2)
Cities: Paris, Lyon, Nice
CET → CEST (UTC+1 → UTC+2)
Cities: Amsterdam
EET → EEST (UTC+2 → UTC+3)
Cities: Helsinki
April 2027
NZDT → NZST (UTC+13 → UTC+12)
Cities: Auckland, Christchurch, Wellington
AEDT → AEST (UTC+11 → UTC+10)
Cities: Sydney, Canberra
ACDT → ACST (UTC+10:30 → UTC+9:30)
Cities: Adelaide
EET → EEST (UTC+2 → UTC+3)
Cities: Cairo
September 2027
NZST → NZDT (UTC+12 → UTC+13)
Cities: Auckland, Christchurch, Wellington
October 2027
AEST → AEDT (UTC+10 → UTC+11)
Cities: Sydney, Canberra
ACST → ACDT (UTC+9:30 → UTC+10:30)
Cities: Adelaide
EEST → EET (UTC+3 → UTC+2)
Cities: Cairo
BST → GMT (UTC+1 → UTC+0)
Cities: London, Manchester, Edinburgh
IST → GMT (UTC+1 → UTC+0)
Cities: Dublin
WEST → WET (UTC+1 → UTC+0)
Cities: Lisbon, Porto
CEST → CET (UTC+2 → UTC+1)
Cities: Berlin, Hamburg, Munich
CEST → CET (UTC+2 → UTC+1)
Cities: Paris, Lyon, Nice
CEST → CET (UTC+2 → UTC+1)
Cities: Amsterdam
EEST → EET (UTC+3 → UTC+2)
Cities: Helsinki
November 2027
EDT → EST (UTC-4 → UTC-5)
Cities: New York, Philadelphia, Washington D.C.
EDT → EST (UTC-4 → UTC-5)
Cities: Toronto, Montreal, Ottawa
CDT → CST (UTC-5 → UTC-6)
Cities: Chicago, Houston, Dallas
MDT → MST (UTC-6 → UTC-7)
Cities: Denver
PDT → PST (UTC-7 → UTC-8)
Cities: Los Angeles, San Diego, San Francisco
AKDT → AKST (UTC-8 → UTC-9)
Cities: Anchorage
What is Daylight Saving Time (DST)?
Daylight Saving Time is the practice of advancing clocks by one hour during warmer months so that evenings have more daylight and mornings have less. Most regions that observe DST shift their clocks forward (“spring forward”) in spring and back (“fall back”) in autumn.
Which countries observe DST?
About 70 countries observe some form of DST, primarily in North America and Europe. The United States, Canada, most of the European Union, the United Kingdom, Australia (partial), and New Zealand all observe DST. Notable exceptions include most of Asia, Africa, and South America. Within the US, Arizona (except the Navajo Nation) and Hawaii do not observe DST.
When do clocks change?
- United States & Canada: 2nd Sunday of March (spring forward) and 1st Sunday of November (fall back)
- European Union & UK: Last Sunday of March (spring forward) and last Sunday of October (fall back)
- Australia: 1st Sunday of October (spring forward) and 1st Sunday of April (fall back)
- New Zealand: Last Sunday of September (spring forward) and 1st Sunday of April (fall back)
How does DST affect timezone conversions?
When a timezone transitions between standard time and daylight saving time, its UTC offset changes by one hour. This means the time difference between two locations can temporarily change. For example, New York (EST/EDT) and London (GMT/BST) are normally 5 hours apart, but during the weeks when only one has changed clocks, the difference can be 4 or 6 hours. Always verify conversions near DST transition dates.