Today is Abib 15, a High Sabbath. 2000 years ago the Messiah gave up his life to pay for our transgressions. Abib 15-21 is also the Feast of Unleavened Bread.
From the beginning of the day of 15th (sunrise) = 04-03 06:00 to
the last evening hour of the 21st = 04-10 05:59, right before a new day begins.
The 1st and 7th days are #HighShabbat days. No work like any other #Shabbat days.
Remember, a day (24-hour period) begins at sunrise or 06:00 (for easy reckoning), and ends until the next sunrise or 05:59 (for easy reckoning).
We observe the Feasts of YHWH because he commanded these, not because of rituals men told us to. It is fine if you stick to pure Torah instructions or if you want to add traditions, it is between you and The Most High. Just make sure you are not doing it as a ritual, otherwise, it is legalism. Do it because you want to obey The Most High. It was YHWH who commanded these, not men, and definitely not the Pharisees.