Maybe it's just me, but I find this question extremely difficult to understand. Let me attempt to paraphrase:

• You have 2 tables: now_time and day_time
• You want to remove records from now_time where the "time" field is older than 5 minutes.
• You want to remove records from day_time where the "time" field is older than 24 hours

If the above assumptions are correct, then I wouldn't bother messing around with localtime. I'd just do it with the sql. Not sure which db you are using, but with mysql the following would suffice:

DELETE FROM time_now WHERE time < (NOW() - INTERVAL 5 MINUTE);
DELETE FROM day_now WHERE time < (NOW() - INTERVAL 1 DAY);
[download]

Apologies if I've misunderstood your question. If that's the case, perhaps you could clarify a bit.

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