| Oracle | ||
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We can use modular arithmetic to calculate the day of the week. We happen to know that 20 May 1962 was a Sunday. We calculate the number of days from that day and take mod 7 value. This tells us the day of the week: 0 is Sunday, 1 is Monday... | ||
| Specific to Oracle | ||
| Dates may be subtracted. The answer is in units of days. | ||