No, entries don’t accumulate into the next day. Every entries you have collected the previous day wii be removed. Your daily entries will only accumulate for the day till after midnight, then the entries restart to zero.
Example: If you spend K20 to buy 7 day 600MB data plan for K18 on the 19th Nov. You get 4 entries for the 19th Nov. If you don’t spend on the 20th Nov, you will see 0 entries.