Different seasonalities add them up into one variable?

[nannigia]

Hi, I have different dummies here for:

Seasonality Seasonality Seasonality Seasonality Seasonality Seasonality Seasonality
New Years day Good Friday Easter Monday May day Bank Holiday Spring Bank Holiday August Bank Holiday Christmas Day

Can i add them to only one variable name holiday seasonality?
or it should be seperate??

Thank you so much for your help :)

[trubador]

You should keep them seperate, since the impact of each holiday may be different.