Simplify the following text for a Grade 5 native English-speaking person.
Original: Year 1 ( I ) was a common year starting on Saturday or Sunday ( link will display the full calendar ) of the Julian calendar ( the sources differ , see leap year error for further information ) and a common year starting on Saturday of the Proleptic Julian calendar .
Simplified: 1 ( I ) was a common year starting on Wednesday of the Julian calendar .