The query "when did 9" is quite ambiguous. It could relate to a number of contexts such as historical events involving the number 9, time zones involving UTC+9, or a specific date involving the number 9. Here are some relevant clarifications from the search:

• UTC+9 time zone is 9 hours ahead of Greenwich Mean Time and does not use daylight saving time.

• The date "9 September 2025" is 45 days from now (Aug 28, 2025).

• There is historical information about the 24-hour clock, which counts hours from 0 to 23, including the hour 9.

If the interest is in a historical event or particular significance of the number 9, or more context about "9" (such as a date, time, or event), please specify. For now, the main factual points connected to "9" are related to the UTC+9 time zone and the date 9th September 2025.