Commits:
- 7ed0c3694d324f5c02d5b224e7e3163d2fd84c52 Allow hours-only offsets. Normalize. (#4676)
- 112fff6b7866f909583cd6f62c43fb639420b069 Fix iso tests
- 6176dcb570186c4945223fa83bcf3221cbfa1af5 Improve ISO second handling (#4680)
- 8e20a2018df854734a09e81e3dfbe598c42911e3 Use consistent variable names for IP examples ()