ssis adding year to date of database with script component

i have a database with no year, only day and month (example 20-12). because of this, the database adds the year automatically. The problem with this is, that in some cases the year is ahead of time, for example 20-12-2020, while it's actually 2019.

example of the table:

order_number date_of_order (original table)
1 20-12

how it looks when i add the database in ssms:

order_number date_of_order 1 20-12-2020

What i want to do is add the right years to the day and month with scripts component. for example if the date is in the past, then make it 2019. If the date is in the future make it 2020.

If you are already starting with a date then you can just use a derived column to do your transformation:

Use this as formula similar to the c# above:

OrderDate > GETDATE() ? DATEADD("yy",-1,OrderDate) : OrderDate