No. It was April 20, 1946 (April 21 was a Monday).

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

Rome's date of establishment is April 21, 753 BC.

April(20-) or May(-21)

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

The city of Rome was founded on April 21, 753 BC.

21 April 2010 will be a Wednesday.