Explain my workings?
OK.
The last pic of the Eiffel Tower suggested a French influence, so:
First picture - The - In French - La or Le
Second picture - A Tower - French for tower is "la tour"
Third picture - Sandra Dee - de is French for "of"
Fourth picture - The Eiffel Tower, a symbol of France.
Therefore, assuming the TDF is masculine, we arrive at "The the Tour de France".
😉
National car logo
100/temp
Pawl (Paul)
Calendar
Roman
Just a wild guess here, but on the right track or heading into a dark tunnel with no exit...
National (car rental) logo- ✔️
100 (temp)- work on it.
Pawl (Paul)- Need a different name for “pawl”.
Calendar- X. This symbol is a meme for something else.
Roman- This clue represents a date. I thought I might add several / to separate the numerals. Maybe a future clue.
This celebration is honoured in the U S and Canada. And the UK. Not sure about elsewhere.