Changes
Support the df=US parameter, without breaking the called template
## displayed text ([A/a]s of [Start date] by default)
-->{{#if: {{{alt|}}} | {{{alt}}} | {{#ifeq: {{{lc}}} | {{{lc|}}} | a | A }}s of {{#if: {{{3|}}} | {{Start date | {{{1}}} | {{MONTHNUMBER|{{{2}}}}} | {{{3}}} | df={{#ifeq:{{{df|}}}|US||yes}}} }} | {{#if: {{{2|}}} | {{MONTHNAME|{{{2}}}}} }} {{{1}}} }}}}<!--
## ref/update inline banner (hidden by default)
