SPOILER ALERT. Do not read this time line until at least chapter 53. If you haven't noticed, some of the chapters are not in chronological order for dramatic effect. Although if you are confused, use this time line.
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Day 1
Hikaru becomes infected at night
Parasites attacks precinct and infiltrates the morgue
Principle's wife is targeted at the bar to get to the principle.
Day 2
Hikaru goes to parasite meeting and searches for Aimi with Chiho then goes to his first harvest
Day 3
Battle Royale at gym after school, then follows Junpei. Goes to harvest and only did one round trip before fighting Genji - harvesting stops. Hikaru is dropped at home but secretly attacks homes in other wards. Kills Haruto's family. Mimics Aimi's mother.
Day 4
Hikaru was awake all morning. Kendo sparring, afternoon steak date with Chiho,
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Day 5