Easier yet - just install ntp and use that instead, and systemd won't do anything time related.
FWIW - I've found ntp handles drift better by far, and I've been using it happily everywhere for well over 20 years across all unixy platforms of all vintages so I know what I'm getting. You never know what systemd is going to do or change os to os and version to version. You gotta fight the systemd borg whenever possible :-) Here's the logs from a pi4 using ntp that I am running the simulator on which was powered down overnight. Note how the system boots up initial with a Mar-26 date and weewx waits gracefully for the system to get the correct date+time before proceeding. You'll see the syslog show the system switch to today's date when ntpd updates things and weewx starts up pretty much immediately after. Mar 26 22:42:16 pi4 kernel: [ 0.000000] Booting Linux on physical CPU 0x0 Mar 26 22:42:16 pi4 kernel: [ 0.000000] Linux version 5.15.56-v7l+ (dom@buildbot) (arm-linux-gnueabihf-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1575 SMP Fri Jul 22 20:29:46 BST 2022 Mar 26 22:42:16 pi4 kernel: [ 0.000000] CPU: ARMv7 Processor [410fd083] revision 3 (ARMv7), cr=30c5383d Mar 26 22:42:16 pi4 kernel: [ 0.000000] CPU: div instructions available: patching division code Mar 26 22:42:16 pi4 kernel: [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache Mar 26 22:42:16 pi4 kernel: [ 0.000000] OF: fdt: Machine model: Raspberry Pi 4 Model B Rev 1.1 [...] Mar 26 22:42:16 pi4 kernel: [ 7.491386] uart-pl011 fe201000.serial: no DMA platform data Mar 26 22:42:16 pi4 kernel: [ 7.806915] Adding 102396k swap on /var/swap. Priority:-2 extents:1 across:102396k SSFS Mar 26 22:42:17 pi4 kernel: [ 8.223906] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled Mar 26 22:42:17 pi4 kernel: [ 8.590674] bcmgenet fd580000.ethernet: configuring instance for external RGMII (RX delay) Mar 26 22:42:17 pi4 kernel: [ 8.592910] bcmgenet fd580000.ethernet eth0: Link is Down *Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Initializing weewx version 4.8.0Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Using Python 3.9.2 (default, Mar 12 2021, 04:06:34) #012[GCC 10.2.1 20210110]Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Platform Linux-5.15.56-v7l+-armv7l-with-glibc2.31Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Locale is 'en_US.UTF-8'Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Using configuration file /home/weewx/weewx.confMar 26 22:42:17 pi4 weewx[415] INFO __main__: Debug is 0Mar 26 22:42:17 pi4 weewx[415] INFO __main__: Waiting for sane time. Current time is 2022-03-26 22:42:17 PDT (1648359737)* Mar 26 22:42:23 pi4 kernel: [ 14.316585] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready Mar 26 22:42:23 pi4 kernel: [ 14.383527] Bluetooth: Core ver 2.22 Mar 26 22:42:23 pi4 kernel: [ 14.383597] NET: Registered PF_BLUETOOTH protocol family [...] Mar 26 22:42:23 pi4 kernel: [ 14.700205] Bluetooth: BNEP socket layer initialized Mar 26 22:42:23 pi4 kernel: [ 14.714801] NET: Registered PF_ALG protocol family Mar 26 22:42:23 pi4 kernel: [ 14.735599] cryptd: max_cpu_qlen set to 1000 *Aug 22 08:34:37 pi4 kernel: [ 31.832505] cam-dummy-reg: disablingAug 22 08:34:37 pi4 weewx[415] INFO weewx.engine: Loading station type Simulator (weewx.drivers.simulator)Aug 22 08:34:37 pi4 weewx[415] INFO user.MQTTSubscribe: (Service) Version is 2.1.0*Aug 22 08:34:37 pi4 weewx[415] INFO user.MQTTSubscribe: (Service) Log level: 0 Aug 22 08:34:37 pi4 weewx[415] INFO user.MQTTSubscribe: (Service) Log debug setting: 0 Aug 22 08:34:37 pi4 weewx[415] INFO user.MQTTSubscribe: (Service) Log console: False Aug 22 08:34:37 pi4 weewx[415] INFO user.MQTTSubscribe: (Service) Log file: None -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/0d091386-1e68-4f64-9c7b-44e67de544afn%40googlegroups.com.
