无法使用{{now}}格式化Handlebars.java格式的日期

import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class DateHelper implements Helper<LocalDateTime> {
    @Override
    public CharSequence apply(LocalDateTime date, Options options) throws IOException {
        String pattern = options.param(0, "yyyy-MM-dd HH:mm:ss");
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        return date.format(formatter);
    }
}

{{formatDate date "yyyy-MM-dd"}}

import com.github.jknack.handlebars.Handlebars;
import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) throws IOException {
        Handlebars handlebars = new Handlebars();
        handlebars.registerHelper("formatDate", new DateHelper());

        // 渲染模板
        String template = "{{formatDate date \"yyyy-MM-dd\"}}";
        LocalDateTime now = LocalDateTime.now();
        String output = handlebars.compileInline(template).apply(new Context(now));

        System.out.println(output);
    }

    public static class Context {
        private LocalDateTime date;

        public Context(LocalDateTime date) {
            this.date = date;
        }

        public LocalDateTime getDate() {
            return date;
        }
    }
}