Havana operates on Cuba Standard Time (CST), which is UTC-5 during winter and Cuba Daylight Time (CDT), which is UTC-4 during summer. To find the current time in Havana, subtract 5 hours from UTC during winter months and 4 hours during summer months.

Yes, Havana and the rest of Cuba observe Daylight Saving Time. The clocks go forward 1 hour to Cuba Daylight Time (CDT, UTC-4) on the second Sunday in March and go back 1 hour to Cuba Standard Time (CST, UTC-5) on the first Sunday in November.

London (GMT/BST): Havana is 5 hours behind London when the UK is on GMT (winter), and 6 hours behind when the UK is on BST (summer). During Cuba's summer (when CDT is in effect), subtract 1 more hour from the difference.

New York (EST/EDT): Havana is the same time as New York when NY is on EST (winter), and 1 hour behind when NY is on EDT (summer). During Cuba's summer (when CDT is in effect), Havana is the same time as NY during EDT.

Tokyo (JST): Havana is 14 hours behind Tokyo, as Japan Standard Time is UTC+9. During Cuba's summer (when CDT is in effect), Havana is 13 hours behind Tokyo.

Cuba's major cities include Santiago de Cuba, Camagüey, Holguín, Santa Clara, and Cienfuegos. Havana is the capital and largest city.

Havana is Cuba's capital and known for its well-preserved Old Havana (a UNESCO World Heritage Site), colorful colonial architecture, classic American cars, the Malecón waterfront, vibrant music and dance scene, and as a major cultural and historic center. The city is also famous for its cigars, rum, and revolutionary history.