[arch-general] pacman has nothing to do last 5 days

[mick howe]

For the last five days or so it reports nothing to do:-

[mick at cave ~]$ pacman -Syyuu
:: Synchronizing package databases...
 core                  135.1 KiB   938 KiB/s 00:00 [######################]
100%
 extra                1647.8 KiB  2.68 MiB/s 00:01 [######################]
100%
 community               4.7 MiB  2.66 MiB/s 00:02 [######################]
100%
 multilib              164.2 KiB  2.97 MiB/s 00:00 [######################]
100%
:: Starting full system upgrade...
 there is nothing to do
[mick at cave ~]$

This is the first time in around 10 years of running Arch this has
happened, has some thing changed in pacman that I missed?