Here are the biggest and most influential recurring tech events worldwide, with a one-line summary, typical timing and primary focus — good if you want conferences, product launches, or industry networking.

1. CES (Consumer Electronics Show) — Las Vegas, January
   Major global stage for consumer electronics and product launches across many categories.

2. Mobile World Congress (MWC) — Barcelona, late February / early March
   The telecom and mobile industry’s flagship trade show (phones, 5G, operators, devices).

3. Web Summit — Lisbon, November
   One of the largest tech conferences for startups, investors, and general tech audiences.

4. SXSW (South by Southwest) — Austin, March
   Mix of tech, film, music and interactive culture; strong startup and product showcases.

5. Google I/O — Mountain View / online, typically May
   Google’s developer conference: Android, web, AI, cloud announcements and dev sessions.

6. Apple WWDC (Worldwide Developers Conference) — typically June (online + in‑person)
   Apple’s annual developer event for iOS/macOS/watchOS/tvOS updates and previews.

7. Microsoft Build — typically May (online + in‑person)
   Microsoft’s developer event focused on Azure, Windows, AI and developer tools.

8. AWS re:Invent — Las Vegas / online, usually November/early December
   Amazon Web Services’ big cloud conference with product launches, training and certifications.

9. Dreamforce (Salesforce) — San Francisco, typically September
   Salesforce’s massive customer/developer event focused on CRM, cloud and AI for enterprises.

10. IFA — Berlin, early September
    Major European consumer electronics and home appliance trade show with big product reveals.

11. Hannover Messe — Hannover, April
    The world’s leading industrial technology fair (automation, manufacturing, Industry 4.0).

12. Collision — North America (Toronto previously), spring
    Rapidly growing tech conference for founders, investors and corporates.

13. TechCrunch Disrupt — San Francisco / New York / online, various dates
    Startup-focused: pitch competitions (Startup Battlefield), investor panels and product demos.

14. Oracle OpenWorld / Oracle CloudWorld — dates vary
    Oracle’s major cloud and enterprise software conference (now CloudWorld in many regions).

15. DEF CON / Black Hat — Las Vegas, summer (back-to-back)
    Premier security/hacking conferences: industry briefings, research, training and CTFs.

16. Slush — Helsinki, November
    Startup and investor heavy conference with strong European startup ecosystem presence.

Notes on planning:

• Many events now offer hybrid/online options.
• Dates and formats can change year-to-year; check the event site before booking.
• If you want a shortlist tailored to startups, enterprise buyers, AI, hardware, or events in Germany/Europe only, tell me which focus and I’ll narrow it down and give next dates + links.