Release dates for Oracle Database 23ai

Cloud:

Base Database Service
19-Sep-2023

Exadata Database Service on Dedicated Infrastructure
2-May-2024

Exadata Database Service on Cloud at Customer
2-May-2024

Autonomous Database on Dedicated Exadata Infrastructure
1H CY2024

Autonomous Database on Exadata Cloud at Customer
1H CY2024

Autonomous Database on Shared Exadata Infrastructure
1H CY2024

On-Premises

Oracle Database Appliance
CY2024

Exadata
1H CY2024

Linux x86-64
1H CY2024

Linux on Arm
2H CY2024

Oracle Solaris SPARC (64-bit)
2H CY2024

Microsoft Windows x64 (64-bit)
2H CY2024

And we still not have dates for the following platforms:
Supercluster
HP-UX Itanium
IBM AIX on POWER Systems
IBM Linux on System z

Patching for Oracle Database 23ai would end April 30, 2032.