Pandas: How to find a particular pattern in a dataframe column?

Using the magic of list comprehensions:

[df.index[i - len(pattern)] # Get the datetime index 
 for i in range(len(pattern), len(df)) # For each 3 consequent elements 
 if all(df['ColA'][i-len(pattern):i] == pattern)] # If the pattern matched 

# [Timestamp('2017-07-10 00:00:00')]