LancasterHistory has planned several events in April.

Leaf & Learn: A Celebration of Arbor Day will be held on Saturday, April 18, from 10 a.m. to 2 p.m. at the LancasterHistory Museum & Research Center, 230 N. President Ave., Lancaster. The new event organized by the Friends of the Tanger Arboretum will feature programs for people of all ages. All programs are free and open to the public, but advance registration is encouraged at http://www.lancasterhistory.org/events/leaf-and-learn/.

The schedule of events includes a tree walk at 10 a.m. for people of all ages. Senior naturalist Lisa Sanchez will lead attendees on a tree walk to discover the different varieties and gain a deeper appreciation for trees, and the walk is limited to 30 people. Also at 10 a.m., an Arbor Day Storytime & Craft for children ages 3 to 7 will include a storytime featuring "Tell Me, Tree" by Gail Gibbons and a leaf and tree bark finder craft. An America250 Tree Dedication will take place at 11:15 a.m., with brief remarks before each attendee gets to shovel a small scoop of dirt to help plant a new bitternut hickory.

At noon, a lecture called "Tanger's America250 Tree & the Patriot Oak" will be held in Ryder Hall. Len Eiserer will speak on the Tanger Arboretum's newest addition, the bitternut hickory, and Lancaster's "Patriot Oak," which has been alive since the signing of the U.S. Constitution. Also at noon, a Nature Scavenger Hunt for Kids will take place. Children ages 6 to 12 will decipher nature-themed hints and clues around the Tanger Arboretum. The final event will be a second tree walk with Sanchez at 1 p.m.

The Nodding Onion Band will perform from 10 a.m. to noon, playing ambient, post-rock music led by electrical frequencies from plants. Light refreshments and vendors will be available from 10 a.m. to 2 p.m. Vendors will include Hickorytown Gardens, featuring a pop-up plant fundraiser with native plants; The American Chestnut; Earthbound Artisan; Lancaster County Parks & Recreation Environmental Education Center; and Lancaster/York County Penn State Master Gardeners.

The event is rain or shine. In pleasant weather, most programs will take place between the museum and the carriage house. In the event of rain, all programs will be pulled inside either the carriage house or museum.

"There Is No Candidate Named James Buchanan," a guided tour of James Buchanan's Wheatland, will take place on Saturday, April 25, at the LancasterHistory Museum & Research Center. Tours will be available at 1:30 and 2:30 p.m.

The tour will focus on James Buchanan and Thaddeus Stevens, and participants will learn about how Buchanan used Wheatland as his campaign headquarters to promote his candidacy for president.

To purchase tickets, visit https://tinyurl.com/James-buchanan-wheatland or call 717-392-4633. Advance reservations are highly recommended as tours may sell out. Members will receive complimentary admission but should reserve their tickets in advance to guarantee a tour time.

The annual Presidential Wreath-Laying Ceremony for President James Buchanan will be held on April 25 at 10 a.m. at Woodward Hill Cemetery, 501 S. Queen St., Lancaster. The ceremony will take place two days after Buchanan's birthday and will feature the laying of fresh flowers at the gravesite of the former president and remarks by the presiding officer of the Pennsylvania Army National Guard as well as local dignitaries.

People and groups who will be present at the ceremony will include Command Sgt. Maj. Albert Singleton, Army National Guard; the Red Rose Veterans Honor Guard with Skip Walls as bugler; Masonic Lodge 43 with John Phillips, senior warden of Lodge 43, as a speaker; Lancaster Fencibles with a 21-gun salute; Scout Troop 58; and Rev. Joel Petruschke, senior pastor of Holy Trinity Lutheran Church, offering an invocation and a benediction.

The event is free and open to the public, and no reservations are required.