diff --git a/bin/weewx/drivers/fousb.py b/bin/weewx/drivers/fousb.py
index 57ba37de..7f772626 100644
--- a/bin/weewx/drivers/fousb.py
+++ b/bin/weewx/drivers/fousb.py
@@ -1093,7 +1093,7 @@ class FineOffsetUSB(weewx.drivers.AbstractDevice):
         """
         records = self.get_records(since_ts)
         log.debug('found %d archive records' % len(records))
-        epoch = datetime.datetime.utcfromtimestamp(0)
+        epoch = datetime.datetime.fromtimestamp(0, datetime.timezone.utc)
         for r in records:
             delta = r['datetime'] - epoch
             # FIXME: deal with daylight saving corner case
@@ -1292,7 +1292,7 @@ class FineOffsetUSB(weewx.drivers.AbstractDevice):
                 if fixed_block['data_count'] is None:
                     raise weewx.WeeWxIOError('invalid data_count in get_records')
                 if since_ts:
-                    dt = datetime.datetime.utcfromtimestamp(since_ts)
+                    dt = datetime.datetime.fromtimestamp(since_ts, datetime.timezone.utc)
                     dt += datetime.timedelta(seconds=fixed_block['read_period']*30)
                 else:
                     dt = datetime.datetime.min
@@ -1516,7 +1516,8 @@ class FineOffsetUSB(weewx.drivers.AbstractDevice):
                     while data_time > next_live + live_interval:
                         log.debug('missed interval')
                         next_live += live_interval
-                    result['idx'] = datetime.datetime.utcfromtimestamp(int(next_live))
+                    result['idx'] = datetime.datetime.fromtimestamp(int(next_live),
+                                                                    datetime.timezone.utc)
                     next_live += live_interval
                     yield result, old_ptr, False
                 old_data = new_data
@@ -1554,7 +1555,8 @@ class FineOffsetUSB(weewx.drivers.AbstractDevice):
                     next_log = None
                     self._station_clock = None
                 if next_log:
-                    result['idx'] = datetime.datetime.utcfromtimestamp(int(next_log))
+                    result['idx'] = datetime.datetime.fromtimestamp(int(next_log),
+                                                                    datetime.timezone.utc)
                     next_log += log_interval
                     yield result, old_ptr, True
                 if new_ptr != self.inc_ptr(old_ptr):
diff --git a/bin/weewx/restx.py b/bin/weewx/restx.py
index e2cb915c..5c2c22a8 100644
--- a/bin/weewx/restx.py
+++ b/bin/weewx/restx.py
@@ -944,7 +944,8 @@ class AmbientThread(RESTThread):
                 if _key == 'dateTime':
                     # Convert from timestamp to string. The results will look something
                     # like '2020-10-19%2021%3A43%3A18'
-                    _v = urllib.parse.quote(str(datetime.datetime.utcfromtimestamp(_v)))
+                    _s = str(datetime.datetime.fromtimestamp(_v, datetime.timezone.utc))
+                    _v = urllib.parse.quote(_s)
                 # Format the value, and accumulate in _liststr:
                 _liststr.append(self.formats[_key] % _v)
         # Now stick all the pieces together with an ampersand between them:
@@ -1083,7 +1084,7 @@ class WOWThread(AmbientThread):
             if _v is not None:
                 if _key == 'dateTime':
                     _v = urllib.parse.quote_plus(
-                        datetime.datetime.utcfromtimestamp(_v).isoformat(' '))
+                        datetime.datetime.fromtimestamp(_v, datetime.timezone.utc).isoformat(' '))
                 # Format the value, and accumulate in _liststr:
                 _liststr.append(WOWThread._FORMATS[_key] % _v)
         # Now stick all the pieces together with an ampersand between them:
diff --git a/docs_src/changes.md b/docs_src/changes.md
index ddd95147..961c7b2b 100644
--- a/docs_src/changes.md
+++ b/docs_src/changes.md
@@ -6,7 +6,7 @@ WeeWX change history
 Python 2.7 is no longer supported. You must have Python 3.7 (introduced
 May 2018) or greater.
 
-WeeWX can now be installed using pip.
+WeeWX can now be installed using [pip](https://pip.pypa.io).
 
 With pip installs, station data is stored in `~/weewx-data` by default, 
 instead of `/home/weewx`. This allows pip installs to be done without
@@ -16,16 +16,18 @@ The new utility [`weectl`](../utilities/weectl-about/) replaces `wee_database`,
 `wee_debug`, `wee_device`, `wee_extension`, and `wee_config`. Try `weectl
 --help` to see how to use it.
 
+Documentation now uses [MkDocs](https://www.mkdocs.org/).
+
 Package installs now use `systemd` instead of the old System V `/etc/init.d`.
 
 Removed all references to the deprecated package `distutils`, which is due to
 be removed in Python v3.12.
 
+Ported to Python v3.12.
+
 Removed the utility `wunderfixer`. The Weather Underground seems to no longer
 allow posting past-dated records.
 
-Documentation now uses [MkDocs](https://www.mkdocs.org/).
-
 Logging handler `rotate` has been removed. Its need to access the privileged
 location `/var/log/` on start up would cause crashes, even if it was never
 used. Users can opt to add it back in by following the wiki on