In my year in review post, I wrote:
To balance out the ongoing adoption of orphaned crates, I'm inclined to wind down maintenance of chrono and chrono-tz in the coming months. The API design for these crates is quite dated, revising it would be a lot of effort, and with jiff there is now an alternative I feel comfortable recommending.
If someone wants to take over and they have a reasonable amount of reputation/references/standing, I will consider it (but strictly on my discretion).