@Override
        public boolean matches(DateTimeParserContext ctx) {
            if (ctx.isSymbolAtCursor(DateTimeTokenizer.Symbol.MINUS))
                ctx.cursor().inc();

            return super.matches(ctx);
        }
The base time for relative statements.
exts/jphp-zend-ext/src/main/java/org/develnext/jphp/zend/ext/standard/date/DateTimeParser.java