Formal:
* Opportune: This implies the timing is perfect for a particular situation or event.
* Auspicious: This suggests the timing is favorable and likely to lead to good results.
* Propitious: Similar to auspicious, it conveys a sense of favorable timing.
* Seasonable: This implies the timing is appropriate for the season or time of year.
* Well-timed: A straightforward way to express the timing is exactly right.
Informal:
* Perfect: This is the simplest and most direct way to say it.
* Spot on: This implies the timing is accurate and precise.
* On point: This is similar to "spot on" and suggests the timing is relevant and effective.
* Just in the nick of time: This implies the timing is crucial and saved the day.
* At the right moment: This focuses on the timing being precisely when needed.
More evocative options:
* Serendipitous: This implies a happy accident or fortunate coincidence.
* Fortuitous: Similar to serendipitous, but emphasizes the luckiness of the timing.
* Providential: This implies the timing was divinely guided or predetermined.
* Perfectly timed: This emphasizes the precision and intentionality of the timing.
The best word for you will depend on the specific situation and the tone you want to convey.