use utc for timestamps as default

README.md

@@ -6,9 +6,11 @@
 
 More prosaically, you can use Sanoid to create, automatically thin, and monitor snapshots and pool health from a single eminently human-readable TOML config file at /etc/sanoid/sanoid.conf.  (Sanoid also requires a "defaults" file located at /etc/sanoid/sanoid.defaults.conf, which is not user-editable.)  A typical Sanoid system would have a single cron job:
 ```
-* * * * * /usr/local/bin/sanoid --cron
+* * * * * TZ=UTC /usr/local/bin/sanoid --cron
 ```
 
+`Note`: Using UTC as timezone is recommend to prevent problems with daylight saving times
+
 And its /etc/sanoid/sanoid.conf might look something like this:
 
 ```

packages/debian/sanoid.service

@@ -5,5 +5,6 @@ After=zfs.target
 ConditionFileNotEmpty=/etc/sanoid/sanoid.conf
 
 [Service]
+Environment=TZ=UTC
 Type=oneshot
 ExecStart=/usr/sbin/sanoid --cron

packages/rhel/sanoid.spec

@@ -58,6 +58,7 @@ Requires=zfs.target
 After=zfs.target
 
 [Service]
+Environment=TZ=UTC
 Type=oneshot
 ExecStart=%{_sbindir}/sanoid --cron
 EOF