Dummy Variable Help

#1
Hi, I require checking on how I constructed these dummy variables and see If I did them correctly. Firstly, the data.

Time period (1-30) of the study (from 3/18/51 to 7/11/53)
Year within the study (0 = 1951, 1 = 1952, 2 = 1953

The first attachment is the set of original data and the second attachment includes the dummy variables.

Thanks
 

Attachments

#2
I assume you only tried to create dummy variables from the time period variable (as there is no apparent reason to create them from the year variable). Seems ok to me.