Yellen will leave her post early next year and there will be other changes at the Fed in 2018. The views expressed this week might not be as relevant as usual.
The ECB would meet on Thursday (in the early hours of Friday, New Zealand time) and could be more interesting, Timms said.
"Nobody is expecting any change in policy from the ECB, but they will inevitably surprise us and take a more hawkish tone - especially given how strong the European economy is looking.'"
Germany's IFO business climate survey, which began in 1991, was sitting at an all time high.
The composite performance in manufacturing index rose to 57.5 last month, the highest since April 2011.
The manufacturing PMI was even higher, hitting 60.1. It was the second-highest level the survey had recorded since it began in 1991. The April 2000 reading 17 years ago was the only time it had been higher, he said.
PMIs for December would be released a week earlier than usual because of the looming holiday break. They would give important insights into how the final quarter of the year had finished for the major economies.
Japan would be first to report at 1.30pm on Thursday. Corresponding releases for Europe and the US would follow overnight.
Thursday was also a likely day for the Real Estate Institute to release its monthly figures.
"We will be watching for any signs of a stabilising housing market following a slowdown during recent months amid election uncertainty and tougher credit conditions,'' Timms said.