Inclusion Criteria:

• * All racial and ethnic groups
• * Body mass index 20-34.9 kg/m2
• * Average sleep duration ≥7 hour/night, assessed during 2-week screening period
• * Eat within 1 hour of awakening at least 5 days/week
• * Midpoint of sleep at 4 AM or earlier

Exclusion Criteria:

• * \<10 nights of sleep \<7 hour during the 2-week screening period
• * Daytime napping
• * Current or past sleep disorder (Sleep Disorders Inventory); Insomnia Severity Index Score \>10
• * Current or past psychiatric disorder, including eating disorders and seasonal affective disorder
• * Any psychological or psychiatric disorder deemed to interfere with study outcomes
• * Smoking (currently smoking any cigarettes or using tobacco products, e-cigarettes and vapes, or ex-smokers \<3 years)
• * Night and rotating shift work
• * Travel across time zones within 4 wk of the study
• * History of drug or alcohol abuse or excessive alcohol consumption (\>3 drinks/day for men or 2 for women)
• * Recent weight change (\>5% gain or loss of body weight over past 3 months) or active participation in diet or weight loss program in previous 3 months; any weight loss procedure
• * Pregnancy or \<1 year post-partum
• * Diagnosed sleep apnea or high-risk score on Berlin questionnaire (2 or more categories with positive score)
• * Depression (score \>13 on Beck Depression Inventory II) or taking anti-depressive medications
• * Restless leg syndrome and circadian rhythm disorders
• * Dementia or cognitive impairments
• * Taking psychoactive or hypnotic medications
• * Taking chronic analgesic or anti-inflammatory medications
• * Having had gastrointestinal surgery, including gastric bypass surgery
• * Restrained eating or abnormal scores on the Three Factor Eating Questionnaire
• * Contraindications for magnetic resonance imaging scanning
• * Hematocrit \<30%
• * Taking beta blockers, as this can interfere with melatonin secretion