These include studies of the therapeutic value of CBD for: 1  Treatment of substance use disorders (opioids, alcohol, cannabis, methamphetamine) 2  Attenuation of the cognitive deficits caused by THC. 3  Neuropathic pain due to spinal cord injury.  Mitigating the impact of cannabis use on risk for schizophrenia.
Every fourthyear is a leap year, as a rule of thumb. But that's not the end of the story. A year that is divisible by 100, but not by 400, is not. So 2000 was a leap year under the Gregorian calendar, as was 1600. But 1700, 1800 and 1900 are not leap years.
One calendar leap year has 366 days: 1 leap year = 366 days. Leap year occures every 4 years, except for years that are divisable by 100 and not divisable by 400. So the mean length of the Gregorian calendar year is: 1 mean year = (365+1/4-1/100+1/400) days = 365.2425 days.