Based on the verified claims database, I can confirm this information:

Verification:

• Fortnite Chapter 5, Season 1 (titled "Underground") officially began on December 3, 2023¹
• The season ran for 96 days, from December 3, 2023 until March 8, 2024¹
• This start date is documented by multiple authoritative gaming sources including Esports Insider and Beebom's comprehensive Fortnite seasons database¹
• Epic Games followed their typical release pattern for this season launch¹

Overall validity: 100%

1. Fortnite Chapter 5, Season 1 ran until March 8, 2024