can some one help me with SPL

[vikram1583]

index= xxxxxx sourcetype=xxxxxx
| eval import_time=strftime(_time, "%Y-%m-%d:%H")
| eval import_timeday=strftime(_time, "%Y-%m-%d")
| eventstats latest(import_time) as Last by import_timeday
| where Last = import_time
| timechart count by Product

with this search the output seems to be hourly instead of daily
Can some one help in sending SPL to see results daily

Thanks in advance

[richgalloway]

index= xxxxxx sourcetype=xxxxxx
| eval import_time=strftime(_time, "%Y-%m-%d:%H")
| eval import_timeday=strftime(_time, "%Y-%m-%d")
| eventstats latest(import_time) as Last by import_timeday
| where Last = import_time
| timechart span=1d count by Product