Based on the search results, the answer to the question "what day do we go back to school?" is not clear as it depends on the specific school district. However, here are some examples of the first day of school for different school districts in Los Angeles County:

• LAUSD: August 14, 2023
• Arcadia Unified School District: August 16, 2023 (High School Only) and August 17, 2023 (Elementary and Middle Schools)
• Manhattan Beach Unified School District: August 23, 2023

It is recommended to check the specific school districts calendar for the exact date.