Need phrasing for events that took place on a single day.

[workergnome]

For instance,

Sale, (Christie's), New York, on March 12, 1992

indicates a single day event, but

Purchased by Jon Smith on March 12, 1992

indicates that the period begins on that day, not that his ownership took place on a single day.

Options:

1. Sale, (Christie's), New York, over March 12, 1992
2. Sale, (Christie's), New York, during March 12, 1992
3. Sale, (Christie's), New York, on March 12, 1992 and just assume the other usage is bad
4. ???

[workergnome]

The decision was that " on March 12, 1992 " should be used for single day events.