If we are to be pedantic it may help by pointing out that both Dec 7th and Dec 8th are quoted in various references as being the date upon which Malaya and Hawaii were first attacked by Japan - Something to do with international date lines.
Singapore was attacked by air on the same date - Dec 8th -
The main assault would follow weeks later in Feb 42. In fact
Malaya was invaded some hours before the attack on Pearl Harbour.
...