Changing calendar patern in existing calendar

We have a situation where we need to align Corporate Calendar with the subsidiary.

We are not trying to change the calendar for a new one.

We want to change the existing calendar pattern !

• by adding a fiscal year with only 33 days and then
• synchronize period end date with a different pattern

Here is a dummy calendar I created to replicate the approach

ACTUAL calendar

Prefix

Type

Year

T

Nb

From

To

Name

P01

TAB

14 Period

TAB

2017

TAB

1

TAB

1

TAB

2016-12-26

TAB

2017-01-22

TAB

P01-17

TAB

P02

TAB

14 Period

TAB

2017

TAB

1

TAB

2

TAB

2017-01-23

TAB

2017-02-19