[Nexus 5X Android Development] imknown:
:) Yes, strange. I met the second issue only once when first time booting up.

The first issue about datetime I can reproduct it here. Here is the logcat.

--------- beginning of main
01-03 15:49:43.433 892 1260 D SntpClient: request time failed: java.net.SocketTimeoutException: Poll timed out
--------- beginning of system
01-03 15:49:45.624 892 910 W LocalDisplayAdapter: Unable to find color mode 0, ignoring request.
01-03 15:49:45.661 12195 12195 D DashboardFragment: Cannot find preference with key system_update_settings in Controller SystemUpdatePreferenceController
01-03 15:49:45.669 12195 21224 W TileUtils: Found com.android.settings.Settings$DataUsageSummaryActivity for intent Intent { act=com.android.settings.action.SETTINGS pkg=com.android.settings } missing metadata com.android.settings.category
01-03 15:49:45.696 12195 22101 D SettingsActivity: No enabled state changed, skipping updateCategory call
01-03 15:49:45.729 12195 22102 D SummaryLoader: No fragment specified for ComponentInfo{com.android.settings/com.android.settings.backup.UserBackupSettingsActivity}
01-03 15:49:45.778 1157 1170 I ndroid.systemu: NativeAlloc concurrent copying GC freed 8212(493KB) AllocSpace objects, 0(0B) LOS objects, 49% free, 14MB/28MB, paused 163us total 146.403ms
01-03 15:49:45.953 892 892 V SettingsProvider: Notifying for 0: content://settings/system/screen_brightness
01-03 15:49:45.975 335 335 I hwservicemanager: getTransport: Cannot find entry android.hardware.light@2.0::ILight/default in either framework or device manifest.
01-03 15:49:46.174 335 335 I chatty : uid=1000(system) hwservicemanage identical 12 lines
01-03 15:49:46.190 335 335 I hwservicemanager: getTransport: Cannot find entry android.hardware.light@2.0::ILight/default in either framework or device manifest.
01-03 15:49:46.202 1354 21936 D DhcpClient: Received packet: 1c:1b:0d:6d:db:1a ACK: your new IP /0.0.0.0, netmask /255.255.248.0, gateways [/10.20.0.1] DNS servers: /10.20.0.152 /10.20.0.144 , lease time null
01-03 15:49:46.206 335 335 I hwservicemanager: getTransport: Cannot find entry android.hardware.light@2.0::ILight/default in either framework or device manifest.
01-03 15:49:49.202 892 3895 E TaskPersister: File error accessing recents directory (directory doesn't exist?).
01-03 15:49:49.237 892 909 I ActivityTaskManager: START u0 {act=android.intent.action.MAIN cmp=com.android.settings/.SubSettings (has extras)} from uid 1000
01-03 15:49:46.521 335 335 I chatty : uid=1000(system) hwservicemanage identical 19 lines
01-03 15:49:46.538 335 335 I hwservicemanager: getTransport: Cannot find entry android.hardware.light@2.0::ILight/default in either framework or device manifest.
01-03 15:49:49.266 12195 12195 W ActivityThread: handleWindowVisibility: no activity for token android.os.BinderProxy@a5dbd17
01-03 15:49:49.283 12195 12195 D SettingsActivity: Starting onCreate
01-03 15:49:49.319 12195 12195 D SettingsActivity: Starting to set activity title
01-03 15:49:49.320 12195 12195 D SettingsActivity: Done setting title
01-03 15:49:49.320 12195 12195 D SettingsActivity: Switching to fragment com.android.settings.DateTimeSettings
01-03 15:49:49.320 12195 12195 D SubSettings: Launching fragment com.android.settings.DateTimeSettings
01-03 15:49:49.330 12195 12195 D DateTimeSettings: NO dashboard tiles for DateTimeSettings
01-03 15:49:49.330 12195 12195 D DateTimeSettings: All preferences added, reporting fully drawn
01-03 15:49:49.332 12195 12195 D SettingsActivity: Executed frag manager pendingTransactions
01-03 15:49:49.349 12195 21224 W TileUtils: Found com.android.settings.Settings$DataUsageSummaryActivity for intent Intent { act=com.android.settings.action.SETTINGS pkg=com.android.settings } missing metadata com.android.settings.category
01-03 15:49:49.362 12195 22113 D SettingsActivity: No enabled state changed, skipping updateCategory call
01-03 15:49:50.311 892 892 V SettingsProvider: Notifying for 0: content://settings/global/auto_time
01-03 15:49:50.315 538 22121 E ResolverController: No valid NAT64 prefix (109, <unspecified>/0)
01-03 15:49:52.041 559 559 W wificond: Failed to get NL80211_ATTR_EXT_FEATURES
01-03 15:49:52.046 559 559 I chatty : uid=1010(wifi) /system/bin/wificond identical 1 line
01-03 15:49:52.049 559 559 W wificond: Failed to get NL80211_ATTR_EXT_FEATURES
01-03 15:49:52.853 892 3895 E TaskPersister: File error accessing recents directory (directory doesn't exist?).
01-03 15:49:55.329 892 1260 D SntpClient: request time failed: java.net.SocketTimeoutException: Poll timed out