How to indicate hour range in Timer using OnCalendar?

Question

systemd 219 version

Ubuntu 22.04.2 LTS

[Unit]
Description=Run myscript.service every 5 minutes

[Timer]
OnCalendar= *-*-* 10-23:10/5:00
Persistent=true

[Install]
WantedBy=timers.target

I need to run my service every hour past 10 minutes until 23:10. (10:10, 11:10, 12:10 ..23:10). I face difficulty in indicating the hours range.

I have tried 10-23, 10..23 even pasted the same date from another post. Still did not work.

Error

Dec 27 16:48:09 node1 systemd[1]: [/etc/systemd/system/myscript.timer:5] Failed to parse calendar specification, ignoring: *-*-* 10..23:10/5:00
Dec 27 16:48:09 node1 systemd[1]: myscript.timer lacks value setting. Refusing.
Dec 27 16:52:51 node1 systemd[1]: [/etc/systemd/system/myscript.timer:5] Failed to parse calendar specification, ignoring: *-*-*10..23:10/5:00
Dec 27 16:52:51 node1 systemd[1]: myscript.timer lacks value setting. Refusing.
Dec 27 16:55:18 node1 systemd[1]: [/etc/systemd/system/myscript.timer:5] Failed to parse calendar specification, ignoring: *-*-* 9-17:00:00
Dec 27 16:55:18 node1 systemd[1]: myscript.timer lacks value setting. Refusing.
Dec 27 16:56:45 node1 systemd[1]: [/etc/systemd/system/myscript.timer:5] Failed to parse calendar specification, ignoring: *-*-* 9-18:00:00
Dec 27 16:56:45 node1 systemd[1]: myscript.timer lacks value setting. Refusing.
Dec 27 16:57:59 node1 systemd[1]: [/etc/systemd/system/myscript.timer:5] Failed to parse calendar specification, ignoring: *-*-* 10-23:10/5:00
Dec 27 16:57:59 node1 systemd[1]: myscript.timer lacks value setting. Refusing.

Answer 1

Support for the x..y syntax for time ranges was only added in systemd version 231.

CHANGES WITH 231:

        * Calendar time specifications in .timer units now understand a ".."
          syntax for time ranges. Example: "4..7:10" may now be used for
          defining a timer that is triggered at 4:10am, 5:10am, 6:10am and
          7:10am every day.

With older versions, you'll need to specify multiple OnCalendar= settings, one for each hour – or change the script itself to check current time and immediately exit if outside the interval.