Set Linux to interpret RTC as local time, or set Windows to interpret RTC as UTC (possibly better, as it won't adjust to DST).
https://askubuntu.com/a/1377011
SVG should be able to be embedded anywhere the regular images can be, at least in browser contexts. The advantages: vector graphics, so infinitely scalable, editable and smaller file size.
My guesses:
a) Amazon.com/co.uk/etc traffic is too big even for CloudFront.
b) They don't want Amazon.com traffic to evict AWS customers' cached items out of CloudFront, the very reason customers buy CloudFront in the first place.
c) Legacy, they just didn't move from Akamai yet.