Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_26 (shutdown VARCHAR, electricity_grid VARCHAR)

### Question ###
When did the Electricity Grid 28.12.1972 officially shutdown?

### Accurate SQL ###

SELECT shutdown FROM table_name_26 WHERE electricity_grid = "28.12.1972"